Dottie Anti-short bushing is ideal for protecting wire insulation from the jagged or sharp cut edges of BX or flex. This anti-short bushing of trade size 3/8-Inch, has plastic construction for longer endurance. It accepts armored cables of size 12 - 3-AWG, 14 - 4-AWG, 4 - 1-AWG and 6 - 1-AWG.