operationtrolleys specifications: 1.it's structure stainless steel round tube 2.above strecther with waterproof face 3.up&down siderails 4.with 4 castors ,2 small castors of them with brakes ,also big wheels . 5. the matress on the strecther is optional . 6.stainless steel I.V. stand, height is adjustable 7.size:1960*600*750mm