Bic Velleda 1751 Drywipe Marker Black (Pack of 12) 904946These Bic Velleda Whiteboard Markers feature ketone based ink that glides on smoothly and erases just as easily, and is 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 chisel tip delivers a variable line thickness between 3. 7mm to 5. 5mm, perfect sketching diagrams or creating bold titles. Chisel nib whiteboard marker with chunky barrel