Review on 🖌️ Micro Trader Refillable Pilot Water Brush Ink Pen for Watercolor Painting - 3 Sizes: 1.2cm, 1.5cm, 1.7cm by Heather Shaw

The largest size is a great little water brush. The medium and small sizes have a design flaw where the black plastic piece that connects the bristles to the clear plastic pin detaches, allowing water to seep over the bristles. This part fits snugly onto the large brush. When I remove the water tank and push the bristles ever so lightly toward the body of the handle, the leaking brushes all the insides of the brush fall out. I tried to reinstall the leaking innards and they are loose because the outside diameter of the black insert is almost 1mm smaller than the inside diameter of the pen body.