High quality. Material: Copper + PVC + Tinplate. Complete kit: delivered with 1200 pcs, flat and spade terminals in 3 colors (red, blue and yellow depending on the diameter of the wire). You will always find the right connector for all your electrical wiring projects. Excellent contacts: The copper core provides increased current flow and ensures less voltage swings, preventing wiring failures and reducing equipment downtime. They resist vibrations in harsh environments, perfectly isolate and protect electronic connections. Easy to crimp and durable: This wire terminal set is a heavy duty assortment of crimp connectors. They are easy to use while providing long term performance. The color of the insulation corresponds to each color used on the majority of crimping pliers to avoid any error and ensure optimal fixing. Properly crimped, your wire will never slip out of these connectors. Numerous applications: It's a handy assortment of terminals and connectors for quick electrical repairs. Ideal for electrical panels, garages, electricians, mechanics, workshops for cars, vans, motorcycles, etc.