The inner diameter is 35mm. The dimensions of the screw holes are shown in the picture. I've attatched the Solidworks-Part. To allow the holes to be edited if necessary

I've printed it with a 0.28mm layer hight (15%) infill. I took 18m 34s and 1263mm of filament to print on my modified Ender 3 V2.

The author marked this model as their own original creation.