Fully functional, original tags, very clean. Manual included (4 pages pdf). Mass flow sensor and controller for air by Bronkhorst Hi-Tec Holland, model El-Flow F-201C-AGB-33-V. Includes two stainless steel swaglok #316 fittings. Specifications: 4 In/min Air, 9 bar (a)/7 bar (a), 20°C N.C. control valve. Pre-owned and tested industrial surplus from a closing plant in Quebec, Canada. Minor surface scratches only.