The DCF14 Eureka filter fits the bagless Eureka Optima 430 series upright vacuum cleaners.

The DCF-14 and the DCF-10 filter are the same exact size.

Older Optima vacuum came with a DCF-10 which is now a DCF-14 filter.

Compare to Eureka filter part # 79982, 75273-1, 62731A, 62731B, 62731 and 62396

Universal Eureka DCF-14 filter replacement part. Examples of Eureka Optima 430 series lightweight bagless vacuum that use a DCF14:

Eureka Optima - 431BX, 431F, 437AZ, 431DX, 431F, 437AZ

Also fit the the Eureka Optima Pet Lover - 439AZ