Hook was designed to fit inside a pool pole. Outside diameter of the hook is 14mm. The hook should be printed standing tall on the build plate. Supports on the build plate only (these come off very easily). Highly recommend PETG with at least 6 perimeters. Plenty strong in my case, I think the aluminum pole would bend before this hook gave out. The fastener should be printed flat on the build plate, no supports needed. Recommend PETG, 12 perimeters will give a solid object. May not be needed but since this part flex's it can't hurt. Orientation of STL's reflect the correct print orientation. The uploaded gCode and 3MF files reflect the settings I mentioned above. Please let me know if you have any issues or comments. Post a make if you can too!