Ceramic refill leads for the Sewline Trio Color Pen in black, white and pink, Strong 0.9mm ceramic leads specially formulated for drafting on fabrics. Can be erased with polymer eraser or dabbed off with water. Very convenient when drafting light or dark fabrics of varied colors. Just rotate grip to advance a lead color-black, white or pink. Leads are refillable. Sewline lead markings can be remove with polymer eraser or be dabbed off with water.