Replacement for Outdoor Pond Water Aquarium Fountain 52231 and 52229. The pond filter screen is made of high-density sponge, which ensures the filtering performance of particles and suspended matter, making the pond water clearer. Package includes 8 pack replacement rectangular filter pads, 4 pack coarse filter pads and 4 pack fine filter pads. The filter mesh is made of good material, which can work stably for a long time in all weather conditions. Recommend replacing filter pad regularly to maintain the performance. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color:As Shown Material:Sponge Package Contents: 4Sets * Pond Sponge Filter Pads Replacement 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.