size of camlock coupling: 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", 4", 5", 6" material: aluminum, brass, stainless steel, PP camlock coupling type EBesides type E, we still have type A,B,C, D, F,DC,DPsize of camlock coupling: 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", 4", 5", 6"material: aluminum, brass, stainless steel, PP