This Refillable Water Brush Pen from Caran d\'Ache is the ideal tool for every watercolour artists with great handling and precision. It has a synthetic nylon brush that is refillable yet flexible enough for beautifully accurate strokes and within the pen is a refillable water chamber. To use it simply unscrew the brush nib and then fill the reservoir with water using the screw style converter. Located on the side is a rubber push button you can simply squeeze that will regulate the water flow to wet the brush and blend your chosen art medium to create stunning watercolour techniques and for adding water to water soluble pencils or crayon drawings. It\'s great to travel and can hold 20 ml of water in it\'s reservoir with the pen measuring 14 cm long and made of plastic so you can take it with you for when inspiration hits. - Brand: Caran d\'Ache - Brush tip: Large - Measures 14 cm in length - Capacity: 20 ml - Rubber push button for regulating the water flow