Specification 1) thick: A-clase material has 0.1mm, 0.15mm 0.20mm, 0.25mm four kinds; B-clase material has 0.1mm, 0.12mm, 0.15mm, 0.20mm, 0.25mm five kinds. 2) length: 6mm~ 15mm 3) package: 0.5gram or 1g plastic bag packed. 4) quantity: 0.2gram, 0.3gram, 0.5gram or 1gram 5) curl: J; C; SC three kinds. 6) mini order: one kind 20gram