Tools for pressing – Guide bushes for press tool sets – Part 1: Type AG, Type BG and Type CG, gliding bushes
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 01/01/2013

Tools for pressing – Guide bushes for press tool sets – Part 1: Type AG, Type BG and Type CG, gliding bushes
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2004