Now available in two water capacities - 4ml and 9ml! A must have for the 'on-the-go' artist. The self-contained water reservoir inside the handle delivers water or pre-mixed colour conveniently and directly to the brush tip. The fine, flexible, nylon brush tip provides excellent dilution and can produce fine lines or bold broad strokes for versatile expression. Product demo video. Small Brush - Approx. size of a Round #2; Medium Brush - Approx. size of a Round #6; Large Brush - Approx. size of a Round #8.