Sealant, Silicone, Gasket -1/2 Inch Thread Brass Knuckle Coupler Quick Connects 90 Degree Thread 20mm x 16mm Highlights Generic Brand 1/2 Thread Brass Knuckle Coupler Quick Connects 2 Inch 90 Degree Thread 20mm x 16mm Description: Brass L-shape 90 degree quick coupler fittings. Industrial threaded adapter, full thickened copper core. The adapter is inserted inside the pipe, the outer diameter of the adapter = the inner diameter of the pipe. Suitable for water pipes, plumbing adapters and fittings etc. Thread outer diameter: 4 point (G1/2 inch 20mm). Adapter outer diameter: 8mm, 10mm, 12mm, 14mm, 16mm, 19mm (optional). Package Include: 1 Piece Brass Garden Hose Adapter Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slight difference. THANKS !