ABS board of bed head/foot, Aluminum alloy side rails, castors, crank control,function of backrest & footrest,HI/LO adjustment ABS Hospital Bed with ... rails, ordinary castors, three cranks,ABS board of bed head and foot.3. The bed surface is made of imported ... anti-impact and fadeless.4. Option:Over-bed table, net-shape bed board, bar-shape bed board, lifting pole. ABS Hospital Bed with Three Cranks