Ketofa Lumbar Support Pad Replacement for Herman Miller, Size B Medium

Provides a moderate level of adjustable lumbar support that is a good option on Amazon for the Aeron classic chairs. You slip the piece into the grooves on the side of the chair and adjust it to the height you prefer. The other reviews mentioned the lumbar pad was popping out under use. To mitigate this issue, lubricate and clean the grooves as well as the C hook of the lumbar pad to allow the hook to move freely, otherwise it will eventually pop out and cause damage to the sides.

Update: just 2 days later and this thing is loose and sliding all around the track. Looks like this will be a return even sooner than I thought. — Zero packaging on the item, just wrapped in plastic. No instructions. Does not feel like an OEM part. The plastic does seem flimsy and the fit seems not great. The positioning and feel isn’t quite right either.

I found a classic Aeron at a local thrift store for $25 (SCORE), but it had seen better days. Aside from being filthy, this little football support as well as the pad at the front of the seat pan were shot. I disassembled the chair and gave it a thorough deep cleaning, lubrication, and replaced these parts while reassembling. It now looked and felt pretty much like a brand new chair. Turns out my chair find was a size B though and I'm a chunky monkey so it wasn't super comfy, I guess I have more of a size C booty, or maybe I'm just not an Aeron fan. I was able to sell it on though for a considerable profit, so I can't complain! Bottom line is this seems like a good replacement part at a fair price.

I had to replace my original support piece. Now this one does not stay put, it pops off.

perfect fit for size C chair.

Terrible product already breaking apart in less than 6 weeks.

just like original

As others have said - it worked great for a month or so, but now it continuously pops off and doesn't offer any support. It's great for a month, but otherwise is a waste of money.

El producto muy defectuoso y de mala calidad, a la semana se instalado se empezó a romper. La pieza original que tenía la silla Aeron, duró 15 años, y esta pieza no duró ni 7 días!!!

Fits and works as original

Product is OK but it sometimes pops out from the tracks so the fit is not good. When it stays in place it works well.

essa almofada fica escorregando para baixo. não fixa onde eu quero. não gostei, e não vale o investimento.

After two months of usage the connection points are bending and flying away when you sit. I bought this by thinking Amazon is the seller but it is not different from the ones cheap fakes