ProAqua Replacement for Bullfrog Flat Filter 10-00814 (4-pack), Length: 10-1/2", Diameter: 8-1/2", Bottom/Core: 1" Thick, Top: 4 pack

Rainbow RDC Inline Filter, PA-1450 PA-1450 Specifications - Outer Diameter: 4-15/16 in. - Length: 13-5/16 in. - Top hole: 2-1/8" open - Bottom hole: 2-1/8" open - Filter Area: 50 ft²