Replaces 2 PACK Eureka DCF-21 Part # 67821, 68931, 68931A, EF91, EF-91, EF-91B. Compare With Eureka # 67821, 68931, 68931A, EF91, EF-91 & EF-91B. 2 Vacuum Air Filters in a pack Eureka DCF-21 allergen filter