●Material:Copper 62%,complaint with North American industrial requirements.Durable solid-brass construction; expertly crafted. ●All corners are polished,Each side is polished.Make sure you are not scratched during the shower spa. ●100% FDA silicone,Resistance to high pressure,easy to clean.16 grain allow you to experience a home spa experience. ●Perfect Design:1/2-inch NPT connections,fits standard American.Size: 2"(50mm) diameter. ●After-sales service:CHOOSE QUALITY,CHOOSE RANDOM.In case of damage or leaking in future use, contact seller unhesitatingly for replacement at any time.