Cambridge Screw-On Wire Connectors Gray 100/Box RANGE Min 2 #22, Max 1 #16 Sol w/1 #18 w/1 #20, 300 Voltage. RUGGED DESIGN Flame retardant thermoplastic shell provides excellent electrical insulation. Fixed, precise square wire spring provides more secure gripping on conductors. Deep skirt entry provides protection from flashover and shorts. Sure-grip ribs improve gripping ability & comfort. Threaded funnel entry guides wires into the connector easily. Cambridge Wire Connectors are UL listed and CSA certified. PREMIUM QUALITY Contractor pack, packaged in a convenient storage box. CAMBRIDGE Performance driven and high quality products are preferred by industry leaders in the Electrical, HVAC, Automotive Aftermarket, Plumbing and Home Improvement Markets. Be sure to view all of our Amazon ASINs for a product solution that works best for you.