The HSTTA25-48-TL Thin Wall Heat Shrink features an adhesive lined inner wall that seals and provides excellent protection against moisture. Applications include insulating and protecting wires/cables in damp locations. Voltage rating: 600 V. Shrink ratio: 3:1. Temperature range: -67°F to 230°F (-55°C to 110°C). Cross-linked Polyolefin. 0.25" (6.4 mm) diameter, 4' (1.2 m) length. Color Black. 250 per package.