Fire Hose Adapter, Fitting Connection Type NH x NH, Fitting Gender Female x Male, Fitting Material Brass x Brass, Fitting Movement Rigid, Fitting Shape Straight, Fitting Size 2 1/2 in x 4 in, Tightening Method Pin Lug, Compatible Pipe Size 2 1/2 in, Hose Fitting A Connection Type NH, Hose Fitting A Gender Female, Hose Fitting A Size 2 1/2 in, Hose Fitting B Connection Type NH, Hose Fitting B Gender Male, Hose Fitting B Size 4 in, Thread Type NH x NH