I received that day and I have to test on, just on small daubs on a sheet printer (you read this it follows further ...). N. B: to fill, push on the body, white translucent plastic, in order to expel the air, then fill it with a little water. Perfect seal. The caps fit perfectly, no risk of leakage in the a priori kit. It should be slightly unscrewed to remove or reuse. There is therefore three different sizes: - No. 1: art - 2: medium point - 3: flat tip. If the first two are about 1cm long, the third is in approximately half. I have not measured them is the eye! The bristles are flexible. A light pressure on the body is required to slide 1 drop of water on hair and wet. I did it on my hand before "flood" the sheet! The amount of water is sufficient and goes smoothly nor out of the blue. Well, as tested just briefly, I do not know how to design the total amount of water will do. To see so over time. To clean hair, a cloth or absorbent sheet will do. Note 2: Be sure to have fairly thick drawing sheets, water it crosses !!! Of course, there are purpose sheets provided for watercolor I will see what will happen in my art therapy books ... As always, Derwent is a great sign of quality. The sizes offered in this lot I liked more. At a lower price than the competition, to boot! On your water tank brushes! ^ _ ^
