Jardin Mesh Aquarium Pond Filter Media Net Bag for Activated Carbon Nylon Product Name: Filter Media Bag; Material: Nylon Color: White; Size: 30 x 26.5cm/11.8" x 10.4"(L x W) Mesh Hole Diameter: 0.4cm/0.16" Weight: 18g Package Content: 1 x Filter Media Bag