About this 3D model

This my first design, I made this to check if my printer is printing with the correct dimensions. The cylinders has 9.5mm, 7.5mm and 5.5mm diameter. Height of 47mm, 44mm, 41mm The base has dimensions of 100mm x25mm x 28 mm The holes in the base have a diameter of 10mm, 8mm, 6mm each, and a depth of 25mm, 22mm, 19mm.