Our pump for gallon jug hand sanitizer is built to last and economically priced. The dispensing pump is fitted with a 38-400 neck finish that fits most standard half gallon 64 ounce containers and standard gallon jugs 128 ounce containers. The white PP 38-400 down-lock dispensing pump with 11.5 inch dip tube. The pump is made of polypropylene (PP), which means it has a high heat tolerance level and an excellent resistance to fatigue. Dip tubes can be trimmed to fit shorter containers.