Brand new Replacement Seat Pan/Frame w/ Mesh & Foam insert for Herman Miller Classic Aeron, size C (3 dots). This is not an OEM, it is an aftermarket and the weight limit is 300 lbs just like the original. Seat pan for a size C chair which is the largest size chair. Does include the mesh & foam. Comes in “Classic Carbon Pellicle” Material ONLY. These are high quality and garanteed perfect fit. I use this myself when I refurbish a chair with a broken seat pan. Seat Frame Dimensions is. Width 21.5″ Depth 19.5″.