Jandorf 3/8 in. D X 3 in. L Rubber Cord Protector 2 pk

This rubber cord protector is also known as a strain relief bushing. By securing the cord at the panel entry point, the cord protector absorbs the forces that are placed on the cord from pulling, pushing and twisting. The rubber tubular shape extends the life of the cable by preventing the cord from sharp bending, allowing it only to curve in a gentle arc shape.