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 Senator Bridge Ballpen BIC Grip roller Senator Super Hit Ballpen uni-ball Grip 247 rollerball