... threads 1) 100% polyester,1.3DX38mm 2) Good quality without knot 3) Chinese factory 20s/2 high tenacity polyester spun sewing threads1) Specification ... :20S/2, 20S/3, 40S/2, 40S/3, 50S/2, 50S/3, 60S/2, 60S/32 ... name: 20s/3 polyester sewing spun yarn3) Count Ne: 20S/2- 60S/24) Material: SINOPEC Yizheng Chemical Fibre Co Ltd 100 ...