If you are still looking for some aquarium filter material bags with reliable quality and , I will tell you that our product will be your . We adopt nylon material, can keep them for a long time. Though it is simple , it's so practical when you use it. Features - ColorAssorted Color - Material: Nylon. - Size S: About 22x17x0.2cm/8.66x6.69x0.08inch. - Size L: About 37x25x0.2cm/14.54X9.82X0.08inch. - Note: Color Zipper. - Note: This product 10pcs in total, 5pcs large size and 5pcs small size. - Made of premium nylon materials, durable and safe for a long time use. - With fine workmanship, not easy to wear and tear, very practical in use. - Can be used to store some ceramic ring, activated carbon and some other filter materials. - They have a simple design in look, but very practical in use. - and , good for friends who have fish tank. Package list: 10 tank filter bags