Westbrass Air Gap Kit with Standard Brass Cap, Stainless Steel, D200-20 Standard air gap cap with plastic body included 1-5/8 in. cap diameter 2-1/4 in. cap height 9 in. overall height with plastic body Cap leaves lip of air gap body exposed when installed Polished Brass Polished Nickel Satin Nickel Oil Rubbed Bronze Stainless Steel Polished Chrome White Matte Black Antique Copper