Rubber push button regulates water flow;The large push button allows for precise control by the artist;Ideal for use with all kinds of watercolour products;This is a great tool for traveling or sketching outdoors

• Caran Dache Medium Brush Nib Artist Refillable Water Brush Pen Aqua Flo Aquaflow Watercolour Empty Brush Container (Pack Of 1)

Caran Dache Medium Brush Nib Artist Refillable Water Brush Pen Aqua Flo Aquaflow Watercolour Empty Brush Container (Pack Of 1)Caran D'Ache