Business Source - BSN20067 Insertable tab indexes are reinforced on both sides at the binding edge and have three holes along that edge for use in standard-size binders. Letter-size, buff-colored divider is made of 32 lb. stock. Gold-colored, Mylar reinforcement prevents tear-out. The eight tabs are multicolored for easy color-coding. Tab indexes include blank white inserts that are compatible with laser and inkjet printers.