100pcs Solder Seal Wire Connectors, Sopoby Heat Shrink Butt Connectors, Waterproof Marine Automotive Electrical Terminals Insulated (35Red 30Blue 25White 10Yellow) High Quality - Comply with all relevant European standards; Shrinking Ratio: 2:1 Easy Operation - Transparent sleeve provides precise inspection when strip and insert wires inside. More Effective Way - An easy one step connection of wires, insulated and sealed No Slip Wire Contact - Tubing reduces in size and solder will melt and flow through the stripped wires, ensure strong holding. Ideal used in marine and automobile applications. Guarantee & Friendly Customer Service - We have a commitment to every buyer 100% satisfaction. Please dont hesitate to contact us if you meet any problems about our products. <span class="a-text-bold">4Types</span>of Solder Seal Wire Butt Connectors---Yellow(A.W.G.:12-10), Blue(A.W.G.:16-14), Red (A.W.G.:22-18), White(A.W.G.:26-24). <span class="a-text-bold">10x Yellow</span>Connectors: Diameter 6.0 mm, Cable cross-section 4.0-6.0 mm<br> (A.W.G.:12-10); <span class="a-text-bold">30x Blue</span>Connectors: Diameter 4.5 mm, Cable cross-section 1.5-2.5 mm<br> (A.W.G.:16-14); <span class="a-text-bold">35x Red</span>Connectors: Diameter 2.7 mm, Cable cross-section 0.5-1.0 mm<br> (A.W.G.:22-18); <span class="a-text-bold">25 xWhite</span>Connectors: Diameter 1.7 mm, Cable cross-section 0.25-0.34 mm(A.W.G.:26-24). 1 x 100pcs (Four Sizes / Colors) Solder Seal Connectors 1 x Reusable Case Precise Inspection when inserting wires inside. When heat is applied, polyolefin tubing reduces in size and adhesive flows inside the insulation. 1. Select the right size of connectors for the wires. 2.Insert the 2 wires to the connector. 3.Use a heat air gun until it is melted in size and the adhesive flows, filling gaps within the terminal. <span class="a-text-bold">Dual-Walled</span> tubing ensures waterproof seal and prevents wire corrosion. Hot Melt Adhesive &amp; Solder inside, Sealed with <span class="a-text-bold">Advanced Waterproof Function</span>.