uxcell Nylon Aquarium Zip Up Filter Media Isolation Net Bag, 21 x 15cm Package Content: 2 x Aquarium Isolation Net Bag; Total Size: 21 x 15cm/8. 3" x 6"(L*W) Color: White; Material: Nylon Product Name: Aquarium Isolation Net Bag Net Weight: 12g Mesh Hole Dia: 2mm/0. 8"