Clarathon 2-Pack Hot Tub Spa Microfilter Disposable Depth Filters replacement for Filbur FC-2392 Micropure MF-170 2-Pack Disposable Filters - Premium Quality Replaces Filbur FC-2392 4-15/16"D x 13-5/16"L 2-1/8" opening each end Genuine Clarathon Brand - STOCK UP & SAVE!!