The UMF Medical SS8311 stainless steel Mayo Instrument Stand features foot pedal height control and a tip-resistant weighted flat base that easily slides under O.R. tables. The removable 16” x 21” (40.6cm x 53.3cm) stainless steel tray provides for easy clean-up. The unit is mounted on 2” (5.1cm) ball bearing swivel casters. The UMF Medical SS8311 Mayo Instrument Stand comes with a 3 year limited warranty.