Highly adjustable seating accomodates multiple users. SAFCO Economy Industrial Stool features a that back has 3" height and 3" depth adjustment. Includes one footrest. 8-year warranty on mechanics and seat; 15-year warranty on support and base. Patented wave tube extension manually adjusts seat height up to an additional 10". First, lift seat assembly out of base. Next, adjust collet to desired height around wave tube. Finally, place assembly back into base. Pneumatic lift adjusts seat another 8". Large 26" dia. 5-leg tubular steel base with 2-1/2" dia. glides insures stability and safety. Exclusive microcellular self skinned polyurethane inhibits punctures, tears and moisture absorption. Meets or exceeds ANSI/BIFMA standards.