Using food grade lubricant is the best way to prolong the life of the O-rings and seals in your draft beer equipment. Keg couplers and party pumps last longer and work better with regular application of a sanitary, non-toxic lube and because you're serving beer, it has to be food grade. Lubricants like this one are specially made to meet all used guidelines. In stock and ready to ship. Features: Sanitary. Non-toxic. Odorless. Tasteless. Meets used 1998 h-1 guidelines. Specs: Size: 4 oz. tube.