6400 Series / HEAVY DUTY STEEL STOOLS WITH VINYL PADDING MADE FROM 0.88 IN. OD QUALITY 18 STEEL TUBE IN 3 FIXED AND 3 ADJUSTABLE SIZES. 14 IN. DIAMETER SEAT WITH AN 11.25 IN.-DIA. 1/2 IN. THICK VINYL PAD RIBBED THROUGHOUT THE SEAT. FEATURES A 0.63 IN. OD TOE-RING WELDED TO EACH LEG AT 4 CONTACT POINTS FOR ADDITIONAL RIGIDITY. OPTIONAL VINYL PADDED BACK IS 6 IN. H AND 12 IN. W AND ADJUSTS UP/DOWN AND FORE/AFT. METALLIC GRAY POWDER COATED FRAME WITH GRAY VINYL PADDING. Fixed and adjustable sizes 18 IN. H, 24 IN. H, or 30 IN. H, with optional backrest. 0.88" OD 18 gauge steel tubing with fixed or adjustable legs. The seat is 14" diameter with 11.5" diameter vinyl padding. 5" riveted through the steel seat pan. 0.63" OD foot rings are welded to each leg at 4 contact points for added rigidity. The optional vinyl padded backrest is 6" high and 12" wide and adjusts up/down and fore/aft.