Package Included: 900Pcs Quick Splice Male and Female Wire Spade Connector & Bullet Connectors Terminals Crimp Terminal Block  suitable for 2.8mm,4.8mm, 6.3mm spade connectors Male and female spade connectors are made of high quality tin-plated red copper, whose surfaces are plated with tin which ensures good conductivity and corrosion resistance.  The insulating sleeves are made of nylon, high conductivity, anti-oxidation, durable enough for your use,matching crimp terminal ,safe to use.  Easy To Use: Just need to connect the male and female terminals at both ends, and then the male and female terminals docked to complete the wiring easily.  wire crimp terminal block with insulating sleeve assortment kit for car, motorcycle, truck, marine,quad bike, scooter, boats, electric instruments