bicycle parts for dropoutMaterials Available: Materials AvailableStainless SteelSS201, SS303, SS304, SS316 etc.SteelQ235, 20#, 45# etc.BrassC36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37) , C28000(CuZn40)Iron:1213, 12L14,1215 etc.BronzeC51000, C52100, C54400, etc.AluminumAl6061, Al6063,AL7075,AL5052 etc