Package Great Value Set Come with 678 pcs, 350 pcs of 17 kinds of three-color terminals and 328 PCS 2 heat shrink tubes: 1. You'll find the right connector and tubing for almost any electrical wiring project. Tubing Heat Shrink Tubing Feature Excellent insulation and flame retardant performance. Soft and flexible, acid and alkali resistance, anti-aging. Does not produce dioxin during combustion, in accordance with environmental protection standards: RoHS standard and Sony-SS-00259 standard. The contraction ratio of the heat-shrinkable tube is 2: 1, the withdrawal temperature is 70 C, rapid withdrawal, just a few seconds, can finish contracting. Connectors Electrical connectors They are made from tam copper inserts and insulation in PVC. Safe, high quality and brand new. All are enclosed in a plastic case for easy access. This wired terminal set is a sturdy assortment of crimp connectors. They are easy to crimp while providing long term performance. your wire will never slip out of these connectors. Area of Application These items are widely used in home theaters, speaker wiring, stroscopic wiring, automotive wiring projects, marine, wiring projects in home, commercial or residential applications. Ideal for garages, auto electricians, mechanics, workshops or cars, vans, motorcycles, etc. PinBoTronix 30 Day Money Back Guarantee 100% customer satisfaction is our relentless pursuit . If you have any questions about our product, please do not hesitate to contact our after-sales services, all problems will be solved promptly.