Create aisle signs for your warehouse or storeroom. Holders snap into standard pallet racks with 2" hole spacing. Flexible paper holders bend to prevent damage when hit. 11 x 8 1/2" yellow paper inserts print on laser printers. Kit includes: 10 holders and 12 yellow card inserts. ULINE offers over 43,000 boxes, plastic poly bags, mailing tubes, warehouse supplies and bubble wrap for your storage, packaging, or shipping supplies.