1 3/8 inch Threaded Cuff. Black banded 1 3/8 inch inside diameter wall end cuff threads onto 1 1/2 inch outside diameter wire reinforced hose. The metal band will activate central vacuums. This is the end that plugs into the wall. Black hose cuff work with hose J1002R, or any 1 1/2 inch outside diameter wire reinforced hose that accepts a screw on hose cuff. Manufacturer Part Number: 42913 Generic Central Vacuum Metal Ring Hose Cuff Black. 1 3/8 inch Threaded Cuff. Black banded 1 3/8 inch inside diameter wall end cuff threads onto 1 1/2 inch outside diameter wire reinforced hose. The metal band will activate central vacuums. This is the end that plugs into the wall. Black hose cuff work with hose J1002R, or any 1 1/2 inch outside diameter wire reinforced hose that accepts a screw on hose cuff. Manufacturer Part Number: 42913 CT-42913