The Surgical/Free Flow vacuum regulator with color coded Standard (0-200-Full Vac) or High Vac (0-760 mm Hg) gauge, each calibrated in mm Hg. Regulator provides continuous, regulated suction from a piped vacuum system. Regulating mechanism is physically isolated from the suction flow path (regulating bar and silastic tubing). Unit provides instantaneous ON/OFF positions. Control knob regulates vacuum levels from zero to full line vacuum in one complete turn. Gauge reports vacuum levels from zero to full-line vacuum. Regulators are equipped with specified adapter and/or fitting. Features and Benefits Straight-through Suction Control Full Range Regulation Glow-in-the-dark increments and needle Durable design and construction Diagnostic Window