Double-sided dowels for joining

Dowel that i made to fix my shoe rack. Dimensions are 30x10mmIn 3mf file are 4 pcs next to each other, brim is recommended due to size of object and for better adhesion. It have slightly plane-cut on Y side due to cylindrical shape so it can be printed easily on longer plane. I used PETG but you try it our with other filaments as well. Probably you will need to use hammer to push it into the hole so PETG is recommended. 50% and higher infill is also recommended.