CVMEV-200 Metal Extract Valve 200mm Diamater Metal Extract Valve £16.90 inc. VAT (where applicable) Quantity: at £16.90 each Add To Basket Steel extract valve with adjustable core. Wall or ceiling mounted valves with locking rings to fix into position. Twist lock the valve once its set at the required opening position. Powder coated RAL 9010 White. Other colours on request.