The 4 pack of fine coloured markers from Empire is optimised for the worksite. Featuring a clog-resistant tip, these markers allow you to make your mark on dusty and oily surfaces. Designed to write on rough surfaces like concrete and brick, the permanent non-toxic ink makes your measurements and plans easy to read in all conditions. The quick-drying time reduces smears and smudges while you write. These coloured markers are made for the busy worksite, lasting up to 75 hours without the cap on. The pack includes black, red, blue, and green markers. Buy yours today.