Koi Watercolour Pocket Field Sketch Box - 24 pack. Light weight and sleek these portable kits slip easily into a shirt or jacket pocket. Each fully contained kit features a water brush sponge a removable palette and twenty-four mini watercolour cakes in a sturdy plastic case measuring only 4-1/2x6-1/8x1-3/16in. Paints conform to ASTM D4236.