KnuKonceptz Heat Shrink is dual wall (min 0.7mm thick before heat is applied) 3:1 ratio heat shrink with heat activated adhesive lining. When heated, the glue bonds the heat shrink to your cable/terminal creating a water resistant seal. Sold in packs of 10 - 2" pieces - Fits 4 Gauge and 2 Gauge terminals Diameter: 19mm (1") Length: 50mm (~2") Color: Translucent Blue Shrink Ratio: 3:1 Temp Rating: 125C Voltage Rating: 600V RoHS Compliant: Yes