HOSE FITTINGS.These high quality nylon hose fittings have a wing nut for easy hand tightening.All have 1/2" female thread to screw straight on to the inlet or outlet ports of Shurflo pumps.They are available with either 12mm (1/2") or 20mm (3/4")hose ends in both straight or 90 deg. swivelling elbow type.