PROLUBE 44211 Easy to use Grease Filling solution to load bulk or combination grease guns from bulk grease pails. No mess or waste. Includes zinc plated pump with zinc die cast pump head and cast aluminum adjusting flange, drum cover, follower plate & female loader fitting. Delivers 1 oz. per stroke; Pump Length: 18"; Drum Cover Diameter: 12". Recommended Use: For Light &Self-Collapsing Grease up to and including NLGI 2