100% Taiwan, Yilan products Effectively prevent the drainage port from being blocked due to leaf or typhoon debris, especially for the roof drainage hole Can be placed directly, pressed with objects, or directly locked with screws Size: 30. Width 20. 10 cm high This product is guaranteed to be made of high-purity stainless steel of SUS304 (18-8), which is not inferior to the market, and has no rusting concerns. SUS304 is the highest grade stainless steel for home, so please don't worry, you can't buy a better one in the market. Even if you go to the department store twice as much, the material will not be better (again, it is the medical grade) Generally, stainless steel that is not marked with 304 is not used in the 304 grade:) Manufacturer: Chengzhi Metal, which has been in operation since 1982, has a rich history and long experience.