We specially make all kinds of hand pumps, grease guns, pneumatic grease filled machines, semi-rotary hand pumps, plastic pumps ... , BST400, BST450, BST500 Specifications: 1) Grease gun: 100g, 200g, 300g, 400g, 450g, 500g 2) High pressure gun: 400g, 450g, 500g, 650g, 800g ... , 1000g 3) Air powered grease gun: 400g 4) Hand push grease gun: 65g, 80g, ...