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Protocol Station The protocol station is designed for convenient wall mounting of high-purity gas regulators. Wall mounting provides ease of use, prevents gas regulator damage, and improves safety. Either chrome-plated brass or 316 stainless steel option is complete with a 3-foot, flexible, all-stainless-steel pigtail with armor casing. The CGA connection on the pigtail has an integral check valve in the gland to prevent contamination during cylinder changeout. *Pressure regulator not included. Order separately. 订货信息: catalog # material fittings units 21347 Chrome-Plated Brass CGA 580 (N2, He, Ar) ea. 21348 Chrome-Plated Brass CGA 350 (H2, P5) ea. 21349 Chrome-Plated Brass CGA 590 (Air) ea. 21327 Stainless Steel CGA 580 (N2, He, Ar) ea.