High Elasticity Thread with different kinds of colors and specifications 32#,37#, 42#, 52# 1.High elasticity thread, Covering with ... rubbers are often 5 specifications 23#,32#,37#, 42#, 52#.2.Colours can be customized, White and Black are enough in stock ... Machine, Leaser, Cover Yarn Machine(for making elastic threads). White/Black Elastic Rubber Covered Yarn