Egg shape gear set. Parts are designed for 3d printing. Suggesting using resin material when printing.Size is 60X35mm. You need to prepare some M3X10 (or M3X8) screws by yourself.,refer to the section image in the attachment.STEP and STL files are included in the attachment. Ignore OBJ and FBX format files, they are just used to meet cgtrader's requirement.More: https://www.twothreed.com