Specification: 2130 * 1020 * 500-720 - mm Three crank hospital bed needs additional one manual crank mechanism rotary axis to realize the function of integral height up & down. Three crank hospital bed is also the most used hospital bed tender purchasing list. While 3 crank prices of hospital beds, purchasing fees will be obvious higher than 2 crank hospital bed. Especially, you make a tender from a branded hospital bed manufacturers.However, the third crank can also be designed to operate the bed trendelenburg or reverse trendelenburg instead of height adjustment.