The Easy-Twist WWC-R-SJ 100-Count Small Jar of Red Winged Wire Connectors are designed for use on copper wires in the 22-6 AWG size range. They???re made of flame-retardant thermoplastic rated for a maximum temperature of 105?? Celsius (221?? Fahrenheit). The quick-grip square spring design grips in fewer twists and can dead-end a single wire, while the ergonomic swept-back wing design and ribbed texture makes them easy to twist. Their compact design is useful for applications in tight areas or anywhere else you need to connect wires. Manufacture Part Number: WWC-R-SJ UPC - 662381142450 Sold as a pack of 100 Units. Standard List Price each is $0.3120