19mm barb is compatible with 3/4" inner diameter hose 50.5mm (1.988") flange. Join the flange end with a gasket and secure with a clamp The flanges are often called quick flange fittings because they are quick to assemble. This rubber hose adapter is made of type stainless steel 304 for corrosion resistance. Material: 304 Stainless Steel; Package Content: 1 x Flange Barb Adapter Size Name:3/4" FEATURES: This series rubber hose adapter is made of type stainless steel 304 and connects two rubber hoses. It has a barbed end to create a tight seal on the inside diameter (ID) of a hose. To complete a connection, youll need two fittings, a clamp, and a gasket(all sold separately). It is made of type 304 stainless steel for corrosion resistance. This hose adapter is for use with rubber hoses in the food, dairy, and beverage industries. Specification: Material: 304 Stainless Steel Finish: Polished Barb: 19mm (Fit Hose I.D.: 3/4") Flange OD: 50.5mm (1.988") Total Height: 48mm (1.89") Package Content: 1 x Hose Barb Adapter