1 LARGE Fine Overflow Filter Box Intake Round Pre-Filter Foam Sponge per order, 2 available as pictured. Made by Wave Point is a high-quality sponge/foam filter designed for all water types in fish tanks and aquariums. This product helps to efficiently filter out debris and particles from the water, ensuring a clean and healthy environment for your aquatic pets. With a size of 5.39"x3.54", this pre-filter sponge is essential for maintaining crystal clear water in your aquarium.