Below you can find the complete range of blue coloured metal binding rings. All double loops are generally speaking in stock.
Step 3/1: Diam. 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 and 9/16
Step 2/1: Diam. 5/8, 3/4, 7/8, 1, 1 1/4 and 1 1/2