What we often call MONO YARN is actually equivalent to Yarn on Cops in European parlance. mono yarn iron cone = metal cops and we also have paper cops, plastic cops

New product 【FD Antimony free yarn】 Customize for Full Dull Advantage：The heavy metal content in dyeing and finishing wastewater is 0, green and environmentally friendly, reduces pollution and skin contact hazards, suitable for making children's and maternal and infant products Specification: DTY 75D/72F FD, DTY 50D/72F FD Widely usage according customer demands