Side Press Mop Bucket & Wringer Combination SetMop Bucket: This bucket and wringer combination set is molded from 100% polypropylene and is extremely tough. Don't settle for a lower quality plastic that will crack and break with regular use. This bucket can hold up to 32 quarts of water or cleaning solution, and the side press wringer provides plenty of space for the biggest of mop heads for maximum versatility with your cleaning tools. 3" non marking casters push into the sleeve to keep them