Specification: 2130 * 920 * 500-720 - mm There are 3 cranks installed under frame near the bed foot panel, the articulated bed surface will move to have fowler or semi fowler positions by rotating the crank. Normally, one crank is to move the back section from 0~75 degree, second crank is to move the foot section from 0~40 degree, while the third crank is to drive the height of the bed to different heights. The wheels use 125 luxury silent brake wheels Aluminum alloy guardrail (with anti-hand clamping function)