3 blades iris mechanism-sun and planetary gear type. Parts are designed for laser cut, but you can 3d print the parts too. The outer diameter is 130mm, center hole’s diameter is 43mm, and total thickness is 12mm. DXF(DWG) and STL files are included in the attachment. DXF(DWG) file is for laser cutting; STL files are designed for 3d printing. Suggest to use resin material if you plan to 3d print the parts.Ignore the OBJ and FBX format files,they are only used to meet cgtrader's requirement.