More Convenient and Faster - A of options, different color terminals with recognizable markings, just measure the wiring diameter to quickly select the right connector, easy to use, no crimping, no electrical tape, only with a heat can be completed. Better Sealing Performance - Each butt connector has two hot melt adhesive rings to protect the wire and that they can withstand wet environments. During the heat shrinkage process, the welded wire connector can tightly wrap the wire to the Good electrical conductivity. Robust - High transparency adhesive-lined polyolefin tubing for direct visual inspection,this self- connector is made of far more friendly to the environment heat shrink tubing, lead-free high purity solder rings and sealed hot melt adhesive to easier wiring connections and save time. Versatile - Easy to store and carry. Butt terminals Suitable for marine, automotive, electrical or other outdoor projects. Excellent stability, water resistance and electrical conductivity provide long-lasting connections. Connector Type:Butt Splice Contact Material:Polyethylene Solder Insulation Material:Polyolefin Stud Size 26-10A.W.G. White 35PC Red 50PC Blue 45PC Yellow 10PC To avoid shrink tubing melting before the solder ring, our heat shrink electrical connectors have been modified to employ proprietary material in the butt connectors. The success rate of joining wire has significantly increased. Note: due to different production batches, the plastic box is random, don't accept the specified color Colour:Photo Color Material:PE Package Contents: 140 x Solder Seal Wire Connectors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.