Make your bottles of materials a lot more handy with our nutrient pump. Just like the pumps you've used on body wash, soap, and other household essentials, this pump makes it simple to deliver just the amount you need. No more spills from trying to lift and pour heavy canisters -- just screw this pump onto the lid of a one-gallon container and pump away. Fits 38/400 necked botle, 1oz.