Five casters on the base provide sturdy footing and additional mobility and convenience for this Mayo Instrument stand by Drive Medical. The product includes a removable stainless steel tray that measures a roomy 19" x 12.5". The tray height adjusts from 29.5" to 47" and is secured in place by a lock. Casters provide additional mobility and convenience|Removable stainless steel tray measures 19" x 13"|Tray height adjusts from 29 1/2"- 47" with lock|5 caster base for stability