Omnimed preprinted poly divider set # 220917, top open, 14 tab/set complete choice of side opening and top opening preprinted styles. All dividers are foil hot-stamped. Side open sets are 7-hole punched, top open sets are 5-hole punched. Tabs printed on one side. Compatible with other charting systems. Shipped collated & bulk packaged. Made of heavy gauge polyethylene plastic. Virtually indestructible and easily wiped clean.