-4-20m dental floss . -fiber: PTFE, UHMWPE, ect.. -waxed, unwaxed,yellow colors -various flavous -CE,FDA passed Round Dental Floss, manufacture according ... to customer requirement PTFE/UHMWPE dental floss.Waxed and mint as ... 20m as you choose.3.stretchy fiberPTFE, UHMWPE floss.4.fiber featuresnon-flying hair, no broken wires,the tension ...