One Package of 2 New Genuine Royal Vacuum Cleaner belts for Royal Commercial Lightweight Vacuum Cleaner Model number CR50005. Package number AR20060, Belt Part Number 38528057. Also known as H3656-Belt and # 6641. These are stretch belts which should be replaced at least once or twice per year. Heavy commercial use may require more frequent belt replacement. Belts lose elasticity and will not spin fast enough on carpeted surfaces to properly clean leading many people to thing they have no suction.