Thomas & Betts Insuliner sleeve has a trade size of 1 Inch. It is constructed from high-dielectric nylon material. It is designed for use with rigid/IMC conduits. It measures 7/8 Inch x 0.025 Inch. It converts ordinary bushing to code-approved insulated bushing without disturbing wiring. It has a temperature rating of 105 deg C. Insuliner sleeve is UL listed and CSA certified. Also known as -Thomas & Betts 424 Insuliner Sleeve 1 Inch Nylon