P610841 Prym Refils . The cartridges for the marking pen can be ordered in white or coloured. The fine stroke width of 0.9 mm make it possible to trace quilting patterns and to transfer other templates cleanly and accurately. Six each of black, yellow and pink cartridges are available in packets of eighteen and white cartridges are sold in packets of six. The cartridges are supplied in a sturdy plastic box, which can also be used to keep them safe for storage. 610841 wh 6pc