This extra-large mayo style instrument stand & work tray has a welded steel frame and has a friction-control adjustable height ranging from 29" to 46" so, you can use it comfortably sitting or standing. The durable welded steel frame and 5-caster star base provides a sturdy foundation so you can safely put all your instruments on the tray without worry. The extra-large 21.5" by 15.75" tray provides a generous workspace and the 1" lip securely holds your tools and instruments. The tray lifts out of the frame for easy cleaning, sterilization, and portability. -Durable Welded Steel Frame -Extra Large Steel Tray lifts out of frame for easy cleaning and portability -Easy to operate friction-control height adjustment -Additional trays available for purchase to switch out toolsets quickly on the fly (extra trays sold separately) -5 smooth rolling hooded casters provide easy mobility --Tray Dimensions: 21.5"l x 15.75"w (tray has a 1" lip) --Height Range: 29"-46" high