The shrinkage rate is 2:1;No crimping required,the transparent heat shrinkable tube provides accurate inspection when inserting wires,and the joint can be perfectly welded and sealed by simply heating the tin sleeve.The internal solder and hot melt adhesives are of premium waterproof standards.Marine IP67 waterproof standard ensures the best solder sealing connection.Suitable for marine boats,automobiles,aquariums,electronics industry and other outdoor applications.The tools used are simpler.The wire can be connected with fire guns,lighters and candles.Operating temperature:-55 Celsius-125 CelsiusMinimum shrink temperature:80 CelsiusColor:white +blue +red +yellowmaterial:plasticMinimum temperature for solder to melt:138 CelsiusMinimum fully recovery temperature: CelsiusPackage Contents:11 x White:diameter 1.5mm,for cable cross section 0.25-0.35mm2(AWG 26-24)25 x Red:diameter 3mm,for cable cross section0.5-1.0 mm2(AWG 22-18)15 x Blue:diameter 5mm,for cable cross section1.0-2.5 mm2(AWG 16-14)4 x Yellow:diameter 6mm,for cable cross-section 4.0-6.0 mm2(AWG 12-10)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.