Metawood Engineering System Pvt. Ltd. Manufactures Three Crank Manual Bed. Metawood Engineering System Pvt. Ltd. Is an ISO 9001:2008 certified company. Three Crank Manual Bed comes with 2130 X 985 X 480 / 720mm size, 3 sets manual crank system 1 pair aluminium alloy bedside rails. 2 nos: urine hooks, 6 nos: IV drip holes, low leg touch position.