Feature:1. Good abrasion resistance and environmental protection, specially designed for harsh environments, to provide protection for wires and cables2. In the case of preventing abrasion, cutting, abrasion and low impact, it creates a cable entry seal and provides environmental seal protection3. Advanced solder seal ring, enough solder to melt and flow around the wire until a seal is formed on the wire, ensuring a lasting connection4. Good weather resistance, the adhesive provided by the right amount of hot melt adhesive system, cools, hardens, and reaches the bonding strength within a few seconds, giving a lasting bond5. Quick to operate, only a heat gun is needed to fix and connect the wires tightly.Specification:Item Type: Heat Shrink TubeMaterial: Nylon, tinUses: Industrial production, electrical circuitsWiring Range: SST-S41 (yellow): 4-6mmSST-S31 (blue): 1.5-2.5mmSST-S21 (red): 0.5-1.5mmSST-S11 (white): 0.25-0.34mmStripping Length: Approx. 10mm / 0.4inWorking Temperature: -55-125Start Shrinking Temperature: 80The Temperature at Which the Solder Begins to Dissolve: 138Complete Melting Temperature of Solder: 160Shrinking Temperature: >160Dielectric Strength: 1KWProtection Level: IP67 How to Use:1. Get ready to strip the wires2. The casing is inserted and the wires are connected3. Heat it with a heat gun4. Make it shrink and set .Package List:50 x Heat Shrink Tube