Use Bridgeport’s 1001 Trade Size 1 (3/8") Anti-Short Bushings to protect conductor sheathing from sharp edges and rough ends within AC, MC and MCI-A cables. Place the bushing between the outer metal armor and the conductor at the point of connection to form a protective shield. Called "redheads," these bushings are made from sturdy red polyethylene plastic and are rated up to 90℃. Bushings are both UL and CSA listed. Trade size 1 bushings fit cable sizes 14/4, 12/3, 6/1 and 4/1.