This Supervacuums Vacuum Belt is designed to replace the Royal and Dirt Devil Style 4/5 vacuum belts. The belt can also be used with the Regina Housekeeper Plus upright vacuum cleaners. The belt size is 4 1/2" x 7/16" x .108 thick. Supervacuums strives for quality and our vacuum belts exemplify our commitment. Supervacuums is a family owned business with over 75 years combined experience. We have been in the vacuum industry since 1973. Whether you are looking for a good upright, canister, central vacuum, or air purifier rest assured Supervacuums has what you need. We pride ourselves on not only having a very thorough selection, but offering the highest quality products available in today’s market.