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 Office Star SPACE® Air Grid™ Executive Mid-Back Chair with Leather Seat, Black:
I have had this chair for a year and half. When compared to other chairs (in this price range) I have owned, This one is superior in every respect. I have nothing negative to say about it. I especially like the 2-to-1 tilt control. This allows me to lean back without the seat moving at the same rate. In other words this is not a rocking chair. It looks great and has proven to be very durable. The lumbar support is fully adjustable and functional. Finally, it is very comfortable. I would not hesitate to buy another one!