Specification:2120x970x450/700mm Integrated stamping frame and mattress base are steel made with epoxy. Polyester powder coated & baked finish, resistant to chipping and scratching. Bed head/foot board and bed frame are made of wood. Function: Height adjustable from 450 to 700mm; Back-rest lifting angle is 0-80; Knee-rest lifting angle is 0-40; Standard accessory: Motors--------------------3 pcs Central locking castor---------------4 purchase