Model NO.: EN856-4SP Diameter: Inner Diameter From 4.6 to 63.1mm Standards: En856-4sp Inner Diameters: 1/4, 3/8, 1/2, 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 etc. Materials: Rubbers and Plastics Enforcing Layer: Steel Wire Spiral