Features: Brass materials, Terminals appearance is tinned to increase electrical conductivity, anticorrosion and antioxidation. PVC sheathes have flame-retardant insulation properties and high protections level. Designs with insulation flare, which makes wire insertion easy and eliminates loose strand of wire, and prevent wire ends from fraying or breaking. Suitable for various equipment switches, batteries, automobiles and households, electronic component with wiring port. Great for car amp & battery terminals.use these to cleans up the look in engine bay and amp connections. Specifications: Materials: Plastic Quantity: 280pcs/1900pcs/1800pcs Size: as shown in the picture Package Includes: 280pcs/1900pcs/1800pcs Double Wire Ferrule note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.