Size & Package: These rectangular filter pads come in a two-piece set. Our rectangular filter pads measure approximately 10.43x5.5x0.98 inch with 2 coarse and 2 fine filter pad included, you'll be to collect both large and small debris for a more thorough filtration process. Efficient Pond Filtration: Made from high-quality filter sponge, our rectangular filter pads provide maximum durability and effective filtration. The coarse filter pads capture large debris in the water and fine filter pads capture small debris in the water, ensuring a clean and clear pond for your fish and plants. Versatile Compatibility: Our replacement coarse and fine filter pads compatible with mode 52231 and 52229 filter boxes, also suitable for use in pre-filter boxes, filtration systems, and pump filter boxes, making them perfect for small ponds, outdoor ponds, and shrimp ponds. Easy to Install: With a pre-cut hole in the center, these pond filter pads are designed to be easily punched out, making installation quick and hassle-free. Regular Replacement: For optimal pond health, we recommend replacing your filter pads annually. Our pond replacement filter pads come in sets of two, including both coarse and fine filter pads. Color: Blue + Black Material: sponge Package Contents: 2 x coarse filter pad 2 x fine filter pad 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.