Morris 12750 Nylon Insulated Ferrule Din Standard 12 AWG Wire Range, .472-Inch Pin Length, Gray, 100-Pack Nylon Insulated Crimp Ferrules - Our Nylon Insulated Ferrules are perfect for Din Rail Terminal Block Applications and other terminations. Ensures Gas Tight Termination in IEC Style Din Rail Mounted Terminal Blocks and other Terminations Manufactured from High Strength Electrolytic Seamless Tubular Copper Electro-Tin Plated for corrosion resistance Flared Barrel for Ease of Wire Insertion