High quality staple refill cartridge case for your Brother SF-4000 Staple Finisher. Create professionally finished documents with ease. Designed with Brothers exacting standards, you can be confident that the staple refill works effortlessly with the Brother SF-4000 Staple Finisher. Your staple refills come ready to use in a pre-filled staple cartridge case. Refilling your staple cartridge is simple and only takes a few seconds. The SR100 contains 2 staple cartridge cases, each holding 5000 staples.