Ref.No.

Description

17.37

U.S. Std 1-15 (29 Rings) width 2mm

17.37A

British Std. A-Z, 1-6 (32 Rings) width 2mm

17.37B

Universal Sizes 1-36, 41-76, 1-15, 13-24 (36 Rings) width 2mm