180PCS Wire Nuts, Insulating Insert Twist Electrical Wire Connectors with Spring INSULATION MATERIAL These electrical wire connectors are made of the plastic shells. The nylon shaped shell has thick walls, high hardness, and is not easy to aging. STRONG SPRING DESIGN These Wire Nuts are made of metal spring, which is inserted to ensure a stable connection to each application. Preventing the connection from falling off due to instability. Specification: Voltage: Rated at 600V Max Temperature: Rated at 221°F (105°C) maximum Material: nylon, copper Package: 50Pcs - Grey - Wire nuts 50Pcs - Blue - Wire nuts 50Pcs - Orange - Wire nuts 18Pcs - Yellow - Wire nuts 12Pcs - Red - Wire nuts High practicality: This product has high practicality and can be used in many places Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-WuhanGQ shop 3