The Lube-Shuttle® Cartridge Refill Adapter allows lube-shuttle® cartridges to be refilled. Simply attach the refill adapter to a bucket pump or pneumatic grease pump and thread in an empty lube-shuttle® cartridge and work the grease pump to fill the cartridge. This adapter allows users to fill lube-shuttle® cartridges with grease other than the brands of grease that are currently supplied in LS cartridges.