FeaturesNew alcohol based ink formulaLow odourLeaves no marks when wiped outBright coloursConical design fits snugly in the hand for better writing controlThese Bic Velleda 1701 Whiteboard Marker (Pack of 4) feature ketone-based ink that glides on smoothly and erases just as easily, and is a low odour to ensure comfort when writing extensively. It features a strong acrylic tip that will not bend or retract into the barrel, even with heavy use. The bullet tip writes a consistent bold line for ease of use.