LARGE 13-3/4" SEAT DIAMETER WITH A HEAVY-DUTY FORM • BLUE VINYL PADDING ADDS COMFORT AND RESIST STAINS • 16" X 16" HANDY SEGMENTED TOOL TRAY • WIDE WHEEL BASE WITH SWIVEL CASTORS • EASY TO REACH LEVER ADJUSTS SEAT FROM 16-1/8"~20" • 4 PCS BLACK RUBBER CASTOR • SIZE: 2-1/2" DIA.