50 Pcs Heat Shrink Connectors for SST21 Cables Waterproof Sleeve AWG22-18 Electrical Butt Joint Solder Terminal Tinned (50pcs Mix Color)

Multi material full coverage: including PVC, polyolefin, silicone rubber, and PTFE materials, suitable for different protection needs in various scenarios. High shrinkage ratio optional: Supports 2:1, 3:1, 4:1 shrinkage ratios, tightly wrapping the protected object after heating. Wide specification adaptation: Available in diameters ranging from 1 mm to 50 mm, suitable for wires and cables ranging from 0.25 mm ² to 400 mm². Wide temperature resistance range: working temperature -65°C -260°C, stable performance in high and low temperature environments. Core insulation protection: dielectric strength ≥ 10kV/mm, effectively isolating current and preventing short circuits. Flame retardant safety design: compliant with UL VW-1 flame retardant standard, self extinguishing within 30 seconds, reducing fire risk.