Printed in PLA at 0.2 layer high, 15% infil, generated with Simplify3d. the ballbearing covers are printed at 0.1 layer high, 100% infil. all put together with superglue. https://goo.gl/photos/4vikj6a8... I use for all project : 10 pcs. flange nuts 5mm, two for eatch hole. one ballbearing 625 16 * 5 * 5