Nsi Industries WC-Y-C Easy-Twist Non-Winged Wire Connector: * Flame-retardant, UL 94V-2 thermoplastic shell provides excellent electrical insulation * Temperature rating of 221 degrees Fahrenheit * Fixed, precise square wire spring provides secure grip * Deep skirt entry provides protection from flash over and shorts * Pre-twisting of wires is not necessary * 1000V max in fixtures and signs * For copper wire only * Includes 100 * Color: Yellow