THE FORTIFIED CONSTRUCTION AND SOFT COMFORT OF THE 6400 SERIES HEAVY-DUTY PADDED STOOL IS IDEAL FOR HANDS-ON EDUCATIONAL SETTINGS LIKE ART ROOMS SCIENCE LABS HOME ECONOMICS OR SHOP CLASSROOMS HEIGHT-ADJUSTABLE LEGS EXTEND FROM 19 TO 27 IN 1-INCH INCREMENTS THIS RELIABLE STOOL FEATURES A STURDY FRAME OF 18-GAUGE STEEL TUBING SECURELY WELDED TO A 14 DIAMETER SEAT PAN RIVETED THROUGH THE STEEL PAN ARE 12-THICK GRAY VINYL CUSHIONING THAT WILL PROVIDE YEARS OF DEPENDABLE USE FOOTREST RING IS SECURELY