1)Non-Standard bolt 2)carbon steel, Class:8.8 3)Surface:Plain 4)can supply special according to your drawing Different Materials available : carbon steel, stainless steel, aluminum, brass and copper Different finish available, ex. zinc plate, black,chrome plate, Hot dip gavani.... Size available : D3-64mm (1/4"-2-1/2"),length:144" max Small orders are accepted Experienced Staff Green Product ...