This is a complete replacement pump and is often purchased as an extra pump. The maximum portion yields 1 oz, which can be reduced in 1/4 oz increments simply by adjusting the portion pin position on the lid lever. The pump design is ADA compliant; requiring less than 5 pounds of pressure to dispense. Parts are removable and dishwasher safe with discharge fittings for dispensing thin and thick pouched condiments and dressings from a 1 1/2 gallon pouch with 16 mm fitment.