Product Description Details Reviews Q&A Large Sponge Prefilter for Mag-Drive 2,3,5,7 Water PumpsLarge Sponge Prefilter for Mag-Drive 2,3,5,7 Water PumpsSmall - Fits Mag-Drive 2,3,5,7Medium - Fits Mag-Drive 2,3,5,7Large - Fits Mag-Drive 9.5,12,18 Product code: 4634Item No. SP-WP-MAG-PFMD