Castor Wheel Stop (65, 60 and 50mm), optional TPU

This is a set of castor wheel stopper for office/gaming chairs in the most common sizes, 65mm, 60mm and 50mm. I have tested and based the design of the 65mm on my Herman Miller Aeron and it works perfectly. The 60mm and 50mm versions should work with other chairs as well.

For each stopper there is a solid version and a version with a TPU base to avoid slippage on solid floors. I used 95A TPU and the fit is pretty tight.