Product parameters: Type: Heat shrinkable tubing Working temperature: >160°C Solder melting range: 11-138°C Shrinkage rate: 2:1 Electrical rating: 600V Color: red, blue, white, yellow, black Quantity: 280pcs The package includes: 25 * White: diameter 1.5mm, used for cable cross section 0.25-0.34mm2 (AWG 25-24) 35 * Red: diameter 3mm, for cable cross section 0.5-1.0 mm2 (AWG 22-18) 30 * Blue: diameter 5mm, for cable cross section 1.5-2.5 mm2 (AWG 16-14) 10 * Yellow: diameter 6mm, for cable cross section 4.0-6.0 mm2 (AWG 12-10) 180 * black heat shrinkable tubing 1 * Transparent storage box Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data. Safe and easy to operate-Preciva solder sealed wire connectors comply with all relevant European standards and do not require crimping. Just put the stripped wire into the solder sleeve and heat it evenly to complete the connection. Waterproof, insulation, anti-corrosion-the double-wall design (outer polyolefin tube, inner hot melt glue and solder) ensures perfect insulation and waterproof performance, and can prevent wire corrosion even in a humid environment. No slip wire connection-the hot-melt characteristics of the internal solder ensure strong tensile strength and tear resistance. When heated, the solder melts to secure the wire firmly and never slips out of the connector. Wide range of applications-our solder wire connectors are most suitable for your ships, vehicles, airplanes, homes and even scientific projects, ensuring safe and weatherproof welding! Equipped with a protective cover with compartments for easy storage and portable use!