Tough and firm, tight winding does not loose Thermoplastic engineering plastics, good insulation, not easy to aging Internal high-angle steel springs, anti-corrosion wear resistance, good electrical conductivity, high quality and durability How to use: Strip the outer surface of the wire, rotate the metal wire and twist it tightly, then insert it into the rotating terminal and tighten it. Suitable for a variety of electrical products, home wiring and other wiring equipment, can be reused, safe and reliable. Specification: Product Name: Screw Type Product model number: PJ-3223-Z Operating voltage: 300V Working temperature: 105C (211F) Material: Thermoplastic engineering plastic Size: Approx 11x11.5x11mm Package Includes: 100 Pieces Electrical Wire Connectors(5 Pack) Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you.