[Fitness] - Aquarium Bio Sponge Foam Filter Pads Replacement Compatible with FX4, FX5, FX6 Canister Filters [Range of Application] - Fx4 Foam Filter Pads are suitable for both freshwater and marine aquariums [Function] - These pre-filter sponges capture micro-particles as the water passes through. Provides efficient water flow with less clogging for long lasting filtration. Helps maintain a healthy environment for aquatic life [Contains 12 Pcs Foam Filter Pads] - Filter sponges should be replaced every 6-12 months as the micro-holes gradually clog with debris, reducing filtration efficiency over time [Easy to Use] - Easy to install and fits directly. This is a non-original aftermarket part designed to match and function properly Color: White Material: Sponge Package Contents: 12 x Fx4 Foam Filter Pads Only the above package content, other products are not included Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement may vary by +/- 1-3 cm