Dear customer, the wire mesh is made of high-quality nylon, with good tension, strong and durable, polyester mesh, we are very confident in our products, but the damage caused by logistics during transportation is unavoidable. If this happens, please take a picture and send an email, we will replace the new product for you for free until you are satisfied, Dry Sift Screen Set (20 x 24") Aluminum Frame, 4 Mesh Sizes - 60, 90, 110, 200 (Micron Equiv. 250, 165, 149, 75) ILAHUI L: You won't regret choosing it, Kief Screen creates quality finished products O: Use solvent-resistant glue bonded, so that the mesh is not easy to fall off V: Assortment of mesh sizes within this set enable a wide of variety of finished YOU: ILAHUI 24-hour online after-sales service, welcome to consult