Adoption of hard engineering plastics, the wire connectors are wear-resistant and practical for use. Plastic shell molding, interior steel, which has better electric conductivity and better grip the wire, won& 39;t fall off easily even with strong vibration. Easy to use, simply strip the wire ends and then inserted into the cap, then pressed with pressure pliers. Features - Color: As shown. - Size: 17.3 x 9.8 x 2.3 cm - Material: Plastic & steel - Installation is easy: Strip the outer skin of the wire, the wire and tighten it. Then insert the rotating terminal and tighten it with pressure pliers. - Broad use: Suitable for all kinds of electrical products, lighting, home wiring and other wiring equipment, reusable, safe and reliable. - Thermal plasticity engineering plastics molding, tough, strong, tightly wound. - Good insulation, not easy to age. - Internal high angle steel, anti-corrosion resistance, good conductivity, not easy to loose. - Dear buyer, due to lighting effect, monitor& 39;s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand