... international standard, European standard EN1492-1: 2000, JB/T-8521 Lifting capacity: 1t, 2t, 3t ... 40t Sling width: 25mm, 50mm, 75mm ... international standard, European standard EN1492-1: 2000, JB/T-8521 Lifting capacity: 1t, 2t, 3t ... 500t Different sling to distinguish between ... interested in contact us, we always welcome your to consultation. lifting straps(Lifting Sling)