Product Feature Wide Application: 200pcs solder seal electrical connectors & 500pcs black heat shrink connectors are not only ideal used in electronics, railway, marine, automobile, motorcycle, aerospace, but also used for other industry and outdoor applications, etc. Super Waterproof: With the dual-wall design and polyamide hot melt adhesive, providing excellent waterproof property in order to ensure the best result, these Waterproof Seal Wire Connectors are very popular with people all over the world. Premium Quality: Our seal wire connectors are made of thicker heat shrink tubing with a combination of low temperature melting solder sleeve. The solder will gradually flow while heating and the insulation tubing will shrink down, ensure creating a waterproof seal. Easy to Use: An easy one-step-connection of wires, soldered, insulated, and sealed. Fast, efficient, no crimping required. Specific color for specific size is easy to pick up for use. And with transparent heat shrink sleeve allowing for precise visual inspection. Product Specification Type Crimping Wire Connectors The Shrinkage Ratio of Red, Blue, White, and Yellow Heat Shrink Sleeve 2 The Shrinkage Ratio of Black Heat Shrink Sleeve 3 Heat Shrink Tubes Material Polyethylene Shrink Temperature >160?c Solder Melting Range 111?c - 138?c Operating Temperature -55?c - 125?c Waterproof Class IP67 Package Included 700PCS Connectors with Box Solder Sleeves: (500PCS) Size: 50 PCS x SST1 White: Diameter 1.5 mm, Cable cross-section 0.25-0.34mm2 26-24AWG 70 PCS x SST2 Red: Diameter 3.0 mm, Cable cross-section 0.5-1.0mm2 22-18AWG 60 PCS x SST3 Blue: Diameter 5.0mm, Cable cross-section 1.5-2.5mm2 16-14AWG 20 PCS x SST4 Yellow: Diameter 6.0 mm, Cable cross-section 4.0-6.0mm2 12-10AW s