circle seal单向阀 2259b-6mm brass buna n 3/4 in male npt 2 psig
circle seal单向阀 2249b-6mm brass buna n 3/4 in male npt 4 psig
circle seal单向阀 2259b-4mm brass buna n 1/2 in male npt 2 psig
circle seal单向阀 2249b-4mm brass buna n 1/2 in male npt 4 psig
circle seal单向阀 2259b-3mm brass buna n 3/8 in male npt 2 psig
circle seal单向阀 2249b-3mm brass buna n 3/8 in male npt 4 psig
circle seal单向阀 2259b-2mm brass buna n 1/4 in male npt 2 psig
circle seal单向阀 2249b-2mm brass buna n 1/4 in male npt 4 psig
circle seal单向阀 2259b-1mm brass buna n 1/8 in male npt 2 psig
circle seal单向阀 2249b-1mm brass buna n 1/8 in male npt 4 psig
