Features: An easy one step connection of wires. Soldered, insulated and sealed can be ideal. Use in marine and automobile applications. Melt adhesive in inside solder and seal and with advanced waterproof function. Polyolefin heat shrink butt connectors improved pullout strength. Provide seal, strain relief, cable check and insulation. Sizes and Quantity: AWG 22-18 Red Connectors: Diameter 2.7 mm, Cable cross-section 0.5 -1.0 mm⊃2; Package Include 100pcs white/red/blue/yellow Heat Shrink Sleeve Tube with paper box 1pcs yellow clip for Cable Splice Steps for usage: 1. Strip the wire jacket. 2. Insert the wire into the connector. 3. Tighten the wires and move them to the center of the tube. 4. Heat the heat shrinkable tube with a lighter or a heat gun.