This is a simple and cost-effective sink drain cleaning brush. It is recommended to print it with a layer height of 0.2mm and a nozzle of 0.4mm. After the brush is printed, you can use a craft knife to cut the bristles out of the cylinder one by one - some bristles will fall off naturally.This is completely normalThe handle should be printed with a layer height of 0.2mm and with the base edge added. After both parts are printed, insert the handle into the brush body, then insert a small piece of wire into the brush hole and bend it to fix it around the handle.