Made of quality materials, this set of heat shrink wire connectors has a and excellent insulation effect, which can serve you well. You don't need to use the to crimp the item when using the solder seal wire connectors, save one step to do it. Convenient and practical, bring convenience to your work. Features - Color: Assorted. - Material: Polyolefin, tin. - Size: About 4.00X0.70X0.70cm/1.57X0.28X0.28inch. - No need to crimp, the sleeve provides precise inspection when strip and insert wires inside. - Polyolefin tubing in outside and hot melt rings in inside effectively improve waterproof performance to make sure the best results. - Tubing reduces in size and solder will melt and flow through the stripped wires, ensure strong holding. - This item is great used for automotive, marine and some outdoor applications. - The package contains 250 pieces solder seal wire joints, large quantity to meet your different needs. Package list: 250 x Solder Seal Wire Connectors