ELECFUN 3/4 Inch 8 Ft Heat Shrink Tubing Roll, 3:1 Marine Grade Adhesive Lined Heatshrink Wire Tube, Waterproof Dual Wall Wiring Wrap for Cable Sealing Oil-Proof Wear-Resistant (4 ft Black & 4 ft Red)

Round Diameter: 3/4" / 19mm (Before Shrinking), 1/4" / 6.4mm (After Shrinking). The flat Diameter is 1-1/4" / 30mm (Before Shrinking). As shown in the second picture Package: 1 pcs 3/4 inch black large marine grade heat shrink tubing roll and 1 pcs 3/4 inch red large marine grade heat shrink tubing roll, each length is 4 feet, total length: 8 feet 3:1 Shrink Ratio: Shrink ratio of our industrial heatshrink tube is 3:1, which makes a tighter seal. Shrinkage temperature: 80 - 125 ℃, professional connections made in seconds Adhesive Lined Heat Shrink Tubing: While heating, the adhesive lined comes out and seals the connection, creating water tight and long-lasting sealing Dual Wall Tube and Safer: Outer wall provides abrasion resistance. The inner wall creates a water tight sealing and strain relief. All heat shrink tubing is UL-listed and compliant with SGS, RoHS, REACH, CE, and ISO9001 standards Wide Applications: ELECFUN's waterproof shrink tube are mainly used for industrial, ship, automotive, wire links, anti-rust and anti-corrosion protection of solder joints, wiring wrap, cable protection, and audio and electrical DIY