... color 4)20D-1120D spandex covered yarnWe can produce spandex yarn at AA grade with ISO90001, oeko-Tex standard 100, SGS ... certificates.Spandex yarn tech parameterElongation at break :710±30%Tension at break:≥98CNStress ... , ISO 90001,oeko-Tex standard 100, SGS certificates5. 20D, 30D, 40D, 70D, 140D, 210D, 840D, 280D, 420D, 560D, 720D,1120D6. any denier ...