Wire connectors solve the problem that many connectors become loosened because of the varying temperatures etc. After a few tests, you will see they still hold tight, and keep good contact. They stand out with reliable secure connections than other types of connectors. Features -Color: As Shown. -Material: Polycarbonate, brass. -Size: About 3.00X2.00X0.70cm/1.18X0.79X0.28in. - Farewell to the traditional electric tape connection, safer, more standardized and more efficient. - Fast operation wiring, time-saving, labor-saving, simple, fast, cost-saving. - No peeling, no exposed conductors, excellent current carrying, to potential safety hazards. - Use piercing connection, do not destroy the original wire protective layer, wire cross-sectional area is larger than its own cross-sectional area, reduce current load. - Connecting quickly and safely, no more bare wires, no more damage to the protective covering layer, can reduce the current load. Package list: 15 connectors 1 x plastic transparent box