Home / Promotional Merchandise / Folders / A4 Polypropylene Ring Binder A4 Polypropylene Ring Binder A4 Polypropylene Ring Binder with 25mm 2 D or 2 O ring mechanism. Add to Quote Categories: Folders, Promotional Merchandise Related products Astaire full colour ballpen Senator Liberty Ballpen Senator Super Hit Ballpen BIC Grip roller