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 basyx™ by HON VL131 Executive Faux-Leather High-Back Chair, Black:
I bought 2 of these when they were 50% off about a year ago; so [$] each. The first one; the Hydraulic post went through the bottom of the base and is making a rut in the hard floor mat. The other when you sit in it goes automatically down to the lowest setting. Then you have to adjust it to the appropriate height again. If you get up and sit back down the cycle repeats.These are nice looking chairs but very poor quality.