Permanent Marker Pen with Hemispherical Rubber at One End is an aluminum cigar type rigid tube. Century Inks Pvt. Ltd. Offers Permanent Marker Pen with Hemispherical Rubber at One End. Century Inks Pvt. Ltd. Supplies permanent markers for the plastic, metal marking and textile industry like permanent textile marker, paint marker, metal marker and plastic marker. There is hemispherical rubber at one end, when pumped slightly compresses ink towards a fine ball point for sharp and fine marking. Basically using a slotted template for marking datum line when testing dimensional stability [shrinkage] to washing and processing on Fabrics.