Designed for use with alcohol markers, these Dual Tip Colourless Blenders feature a clear formula that allows you to blend and lighten alcohol markers. Need to tidy up? They can also be used to soften edges and reduce the appearance of unwanted marks. Double-ended: Round 3mm (0.19in) and chisel 6.3mm (0.25in). Rounded triangular barrel makes it easy to hold and stops it from rolling away. Non-toxic.