Leitz Blue K6 Staple Cartridge (5 Pack) 55910000These staples are made of robust steel for strength when stapling, and can punch through up to 25 sheets at once. With a staple size of 26 6, they use 26 gauge wire for increased durability and a 6 mm leg length sufficient for most stapling jobs. These all in one cartridges help make loading your stapler easier. These items are blue in colour and come in a pack of 5. Heavy duty staples for Leitz staplers 26 6 size (26 gauge wire, 6 mm leg length)