Glass Dies for Flat Minerals

Bergeon 6527-6P;Assortment of 6 delrin (POM) dies with metal core; Thread M6;Thickness 16 mm;For fitting flat mineral watch glasses;Closes waterproof watch cases;To be used with presses G0721 (Bergeon No.5500) and G0723 (Bergeon No.6173);Die sizes (Diameter) -;19; 22; 26; 30; 35 & 40mm