An assorted set of Push Button Waterbrushes from Derwent which are refillable water brush pens that are perfect at creating beautiful watercolour techniques and to take on plein air painting trips outside. They are very straightforward to refill, simply just unscrew the two halves of the barrel and out in the water at the top. The push button mechanism located in the middle of the brush lets you control the water amount of water released giving you plenty of control when you\'re using them. Each waterbrush has a durable nylon fibre tip which holds it\'s shape and point and a protective cap is also included to better protect the tip when not in use. These waterbrushes wont leak and ideal to use with water soluble paints and pencils to create unique effects and styles. In the pack you will find four different sizes which include: Fine tip waterbrush - perfect for detailed watercolour painting. Medium tip waterbrush - perfect for building textures and layers. Large tip waterbrush - creates smooth and blended strokes. Large chisel tip waterbrush - perfect for versatile strokes and washes. - Brand: Derwent - Ideal to use with water soluble paints and pencils - Features push button to better control the amount of water released - Perfect for watercolour techniques - Durable nylon fibre tip - 4 different sizes included