... .NYlon6 and nylon66 Air Covered YarnNYlon + Spandex: 20/15 20/20, 20/30 20/40, 40/40, 70/70, 140/140, 20/70,40/70Draw Rate : 1.9 , 2.2, 2 ... : 40d/34f , 70d/48f , 70d/68f, RWDTY Dope dyed yarn: 40/12 black, 70/24 black, 100/36 blackDTY intermingled yarn ... /72f --1000d, RW Air Covered Yarn Nylon spandex cover yarn 20/30 12 20/40 36