About this item1.G1/2 or 13/16 Inch Male Connector Diameter of Hibbent faucet head thread is 20.5mm or 0.8" or 13/16"(outer diameter), Not 1/2", Not inside diameter is 14mm or 9/16", Only designed for a Standard type of pull out hose, fits most applications, but doesn't fit some models of specific brands, please check the size and thread type before ordering.