50 Round Belts RD for Eureka & Sanitaire Upright Vacuum 30563 52100 Commercial by Generic - 50 Round Belts RD for Eureka & Sanitaire Upright Vacuum 30563 52100 Commercial Sanitaire Modelsut" style belt600,1400,1900,2000,2100,4000,6400 and 5000 Series, except 5180,5184 and 5188Fits all Eureka and Sanitaire commercial vacuums that use a "donEureka modelsAll Eureka and Sanitaire vacuums with the belt pulley in the middle of the brush rollSC679,684.689.886,887,888 and 899inkFrog AnalyticsEureka and Sanitaire models calling for belt RD