Office Chair Cylinder Replacement - Class 4 Durable Steel Chrome Finish Adjustable Height - Compatible with Herman Miller Aeron Pin Version

I bought a used Herman Miller 'size B' Aeron a year ago that was in good condition but also 25 years old. After a year of use, the plastic spacer in the base of the piston cracked apart which made the chair wobbly and unusable. This piston was a one-for-one replacement for the pin style cylinder. Holds like a champ Side note: Make sure to save the black trim/cover ring (where the base meets the cylinder) from your original chair as this does not include that piece. Easy enough replacement. Fits like its supposed to.

The description says the cylinder is compatible with a Herman Miller Aeron Chair. It is not. The end of the cylinder they sent is tapered, whereas the end of OEM part is not. Don't buy this is you have a Herman Miller Aeron Chair because it won't fit the base properly (it will fall through and drag on the ground).

The original cylinder bottom came close to the floor. This one leaves plenty of clearance.

Only replacement I found for an older Aeron that has the pin at the top. Looked like an exact match, but is about an inch shorter than original cylinder. Inserts straight in, not sure what's going on with other review requesting directions, but I did have to back out / loosen the allen bolt that controls the lever mechanism to raise/lower chair, as the original setting would collapse the cylinder when sitting.

This is the correct cylinder for my chair but I’ve been unable to get the pin inserted correctly like the old one was. Need instructions for how to line up.

Have an older aeron and this one works. Had to line up the screw and the tension but back to working like new.

It works just like new