19 mm (3/4") male-theaded; 19 mm (3/4") female-threaded nut end. Includes 2 x PVC washers.
125 mm long.
Drill a 19 mm hole into your tank and install the fitting with the application of a small bead of sealer to the washer faces.
Add a screw-on strainer on the inside of the tank to stop fingerlings going down the pipe. We use this 19mm fitting with a strainer and tap for the outlet at the bottom of our fingerling/header tank, and the 25mm version (#AP-TF25) with strainer at the top of the tank as an overflow.