Zareba® Yellow Standard Snug-Fitting T-Post Insulator

Model #: ITY-Z

9 reviews
0 5 4.4

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  • Fits securely on standard (1.25 or 1.33) studded T-post
  • One molded piece - needs no hardware
  • 25 insulators per bag (Yellow)
  • Service Experts Available To Answer Your Installation Questions

Zareba® Yellow Standard Snug-Fitting T-Post Insulator

Having trouble finding insulators that fit securely?

Our Zareba® Yellow Standard Snug-Fitting T-Post Insulator fits securely on standard (1.25 or 1.33) studded T-posts. Created as one molded piece, this insulator - needs no hardware.

These yellow electric fence insulators are packed 25 per bag.

Zareba® is the largest manufacturer of electric fence systems offering durable, reliable electric fence products for all of your animal fencing needs.


Zareba® Yellow Standard Snug-Fitting T-Post Insulator - Specs

  • Fits securely on standard (1.25 or 1.33) studded T-post
  • One molded piece - needs no hardware
  • Color: Yellow
  • Packed 25 per bag

Disclaimer: does not endorse any information contained in product reviews. Please follow all label instructions for your specific use.

Most Recent Customer Reviews

Review Rate
Review posted on
November 7, 2020
T-Post Wrap-Around Insulators Big Fail! By Barney

I purchased several bags of these T-Post Snug-Fit Insulators (black color) and installed on 142 T-posts in November 2019. They installed easy enough but over the last year the insulators stretched and broke off...every single one of them. :( I have know idea why these failed the way they did but decided to replace them with the brand JAWZ which features a completed different design and they are made in the USA. I am pretty confident these will hold up over time.

Response From Woodstreambrands
Brandon : Consumer Relations Representative

I am sorry to hear this! They are backed by our warranty, please give us a call at 855-592-7322 to further assist you!

Review Rate
Review posted on
July 19, 2018
A all new system By Dinger

I like my new Zareba charger and the insulators plus step in post my cows will they are not as thrilled.

Review Rate
Review posted on
November 23, 2015
Great price, great product and awesome people to w By Jack
From the first purchase to the last order I can only say that this is the way to do Business. Something wrong and it's fixed quickly, no problem. Fast shipping and follow up. I thank you for everything and will continue to do Business down the road as I grow. Jack
Review Rate
Review posted on
August 4, 2014
Amazon Review By
Works as advertised.
Review Rate
Review posted on
July 14, 2014
Amazon Review By
These work great and are cheap. However the metal fence posts I bought from Lowe's are not actually t posts- they look more like a c shape, so these insulators didn't really fit. I was able to bend the metal fence wire to hold these in place just fine however.
Review Rate
Review posted on
June 17, 2014
Amazon Review By
It beats twisting wires on a fence post all day long and it make barb wire electric. So much easier. And every little short cut makes the day go easier.
Review Rate
Review posted on
March 27, 2014
Amazon Review, Great price By
I got two bags of these for the price of one here comported to my local feed stores. Good quality insulators! I've used these before and am happy with them- it's the price that drew me to order from here! :)
Review Rate
Review posted on
January 20, 2014
Amazon Review, worked well By
Snapped right onto 1.5 and 1.25 # t posts. Worked great, great price. Installed 100 of them rather quickly. Easy to reposition.
Review Rate
Review posted on
October 27, 2013
Amazon Review By
If you are putting up an electric fence using T-posts, these are the best insulators I've found. They do the job. They don't pull off easily and they don't bend down so the the fence shorts out. These hold on and keep the fence working!
Read All Reviews (9) Write a Review
Q.Is there a "case" price? - How many per case?

There are 10 bags per case, however, at this time we do not have a case price.

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All About

All About Insulators

Insulators prevent electrical shorts between the electrified wire and the fence posts. Good-quality insulators are critical to a properly functioning fence. Insulators are made from materials that do not conduct electricity, most commonly plastic or ceramic.


Plastic insulators are molded from polyethylene, polycarbonate, or nylon and are designed to hold electrified wire near a variety of posts without losing energy through the post.

There are several styles to choose from because the insulator must match both the type of wire and the type of fence post being used. Plastic insulators include round post insulators, T-post insulators, wood post insulators, corner post insulators, end post insulators, and chain link fence insulators.

Make sure the plastic insulator you choose is molded from heavy-duty, high-density polyethylene (or harder plastic) with UV inhibitors. This prevents arcing and provides long life with all-weather performance, protecting it from the weather. Most insulators are available in yellow, black and white.



Like plastic insulators, porcelain insulators are designed to hold electrified wire near fence posts without losing energy through the post.

When good porcelain insulators are properly installed they should be able to last the life of your fence.

Porcelain insulators are a very good choice for using with your high tensile fence system.



There are specialized insulators that are used for specific purposes. These can be summarized as follows:

Tube Insulators

  • The tube clamp insulator attaches to standard tube-type stock to corral panels.

Corner Insulators

  • Corner post insulators are designed to withstand fence line tension generated by the fence line pulling from the anchor point or changing directions.
  • Corner insulators should also be used at fence line termination points.
  • Corner post insulators are available in plastic and ceramic and accommodate steel wire, poly wire, poly tape and poly rope.

Specialty Insulators

  • Other insulators allow you to fasten electrified wire or poly products to posts and fences without losing energy through the post or fence.
  • There are many specialty insulators to choose from:
    • Chain Link
    • Tube
    • Corner
    • U-Post
    • Square Post

Expert Tips

Insulators come in many styles to accommodate a wide variety of post and wire types. Choose the correct type of insulator for the type of post and wire you've selected.

If you're using a low impedance fence charger, use an insulator with greater arcing protection, which will prevent the current from jumping to the fence post.

Porcelain insulators may be more expensive than plastic insulators, but they are designed to last a long, long time, usually the lifetime of your fence!

Plastic insulators can be used with all types of wire (and high tension if it is designated for it), while porcelain insulators can be used with all wires except for poly tape.

Corner posts and end posts have to withstand greater tension than other posts along the fence line. Therefore, use insulators at these areas that are designed to withstand the extra stress.

In addition, keep insulators free from dirt, dust and cobwebs.


FAQs About Insulators

Q: Do I need insulators for my electric fence system?

A: Insulators allow you to fasten electric wires near the posts without losing energy through the posts and potentially shorting out your system, so yes, definitely use insulators to maintain the current throughout your fence line.


Q: Which type of insulator should I use?

A: There are several factors to consider when determining which type of insulator you want for your electric fence system. These factors include the type of fence post you will be using, and the type of wire you will be using. For corners and end posts you will need to know how much tension you plan to have on the wire.


Q: Is a porcelain insulator better than a plastic insulator?

A: Porcelain insulators are used with high tensile fences as well as standard electric fences. They will last the life time of the fence and add a nice look to the fence. Their only drawback is their initial cost: Porcelain insulators usually cost more than plastic insulators.

Insulators made from plastic are generally used for standard electric fences only, although there are some designed for use with a high tensile fence.

More Insulator FAQs»

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