MHWTSS 20 pack 66100 RD vacuum cleaner belts are round rubber replacement belts for compatible Sanitaire and Eureka commercial upright vacuum cleaners. They are intended to replace 30563B, 30563A, 52100, 52100B, and 52100C belt references. The bulk 20 pack is useful for spare parts storage, multiple machine maintenance, or scheduled belt replacement. Model names and part numbers are used only to describe compatibility. A 20 pack set of round replacement belts for compatible commercial upright vacuum cleaner maintenance. Designed for selected Sanitaire and Eureka models including SC679, SC684, SC688, SC886, SC887, SC888, and SC899. Compatible replacement for 30563B, 30563A, 52100, 52100B, 52100C, and related RD round belt references. Flexible rubber construction supports regular brush roll drive function on compatible vacuum cleaner systems. Compare the old belt number, belt shape, and vacuum model to help choose the correct replacement belt. ASIN B0GMDBPSV1 Item Weight 1.6 ounces Manufacturer MHWTSS Item model number 66100 Batteries required No Product Dimensions 6 x 5 x 0.7 inches