Mistakeproof stem selection - includes 5 wheels and 10 stem fasteners (5 each 3/8"D x 1"L) (5 each 7/16"D x 7/8"L) for all metal-base chairs
Full hood design - 2"D oversized neck, weight rated 100lb. per wheel
Determine correct stem diameter by removing a caster from the leg of your chair base. Match diameter of existing stem and insert into caster body- Discard the other five fasteners
Comments about Global Medium-Back Armless Task Chair, Blue:
I've had the chair for a few months now and I have had any problems with it. Chairs I've had in the past would get loose screws and and required maintence every so often. Plus it's comforable and provides good lower back support.