CDA series: chromium plated brass valves for medical gases and industrial use with o-ring seal. P2000 & P1020 series: residual repressure valves for medical gases. PDE series: Pin Index post and toggle medical valves with o-ring seal. PDR series: Pin index post valves with residual pressure feature and o-ring seal. VIPROXY series: Standard,1Touch and Atom series valves with integrated pressure reducer for medical Oxygen. Plein Air: pressure reducer for medical Oxygen.