Mason Bee Hotel

This “Hotel” is made to use paper straws as nesting material for mason bees but you can also just use the casing, change the size or cut it to a different length and add your own material.The straws can easily be changed when they are not suitable for another season.At the moment I'm using two variations, one with three different straw sizes and one with the two biggest sizes of the three.During some web research I read about a perfect tube length of 16 cm to get a maximum of eggs wich develop into female bees and the ends have to be closed. So my straws are 16.5 cm long since the plugs at the end are having a 5 mm depth.Approximate sizes of the paper straw diameters in mm: Big: inner 7.1 - outer 7.9; medium: inner 5.1 - outer 5.9; small: inner 4.1 - outer 4.9 I printed the “Back” in PLA so that the bees won't chew on pure plastic, the rest is printed in PETG - all in 0.2 mm with a 0.4 mm nozzle, gyroid infill at 15% to 25% in my different experiments. 6 hotels are already in u