The Wirefy 3/4" Heat Shrink Tubing is a large diameter, adhesive-lined tubing designed for electrical equipment and supplies. Made from industrial grade polyolefin material, this dual wall tubing has a 3:1 heat shrink ratio, making it ideal for wrapping around wires with a 1-5 AWG gauge. With a nominal wall thickness of 1.25 inches and an outside diameter of 30 millimeters, this black tubing comes in a 50-foot length, providing ample coverage for various electrical projects. The adhesive lining ensures a secure and reliable connection, while the maximum pressure rating of 10 bars ensures durability in challenging environments. Made in China, this heat shrink tubing from Wirefy is a reliable choice for your electrical needs.