Easy to use: Solderless, frizz-free, you only need a heat gun to complete the connection, much faster and easier than before. Better connectivity: The low temperature solder ring mixed flux improves circuit connection. Double waterproof design: There are two waterproof hot glue rings and hot glue inside each butt connector. tip to prevent water from entering the wire. Resistance to high temperatures and aging: Protection of cables and reduction of the risk of fire in railways, ships and electrical networks Scope of delivery: 10 PCS White (AWG 26-24), 23 PCS Red (AWG 22-18), 12 PCS Blue (AWG 16-14), 5 Yellow (AWG 12-10) Terminals to solder can be used by 0.25mm to 6mm wire. Color as shown Quantity Shipped: 50pcs/set