Giá đỡ cọ vẽ (Brush stand)

This brush stand holds 38 brushes with < 9 mm diameter and 5 < 18 mm diameter. In the front corners, there is space for two very small brushes behind the stands.

Print one of the top and bottom and 4 of the spacer. Then use superglue to glue it together.

The base grid is fully parametric, so all sizes and numbers could be changed. But you will probably have to fix all the extrusions if you want to change those numbers.