3M Highland Wire Connector H-29-BOX, Gray, 22-16 AWG, 100 per Box Use the H-29 in pigtail applications where you need to connect and insulate 2 or more copper wires The straight, twist-on style connector is gray in color and provides a quick connection every time Works great for all kinds of jobs - from industrial and residential construction, to automotive, marine and appliance applications It's easy to spin and tighten the vinyl connector with its steel spring mechanism Use with copper conductors ranging from 22 to 16 AWG in size