1.thickness polyester floss(840D 500D 630D 1000D 1260D) nylon floss:840D PTFE floss: 800D 1200D 1500D 1800D Polymer floss: 400D 2.floss longness 10m----100m as you choose. 3.stretchy fiber PTFE,nylon floss,polyester floss,polymer floss. 4.fiber features non-flying hair, no broken wires,the tension is very good. 5.key materials feature wax imported from Europe. 30 cards into a small carton, 12 small cartons into a outer carton.