Detailed Product Description Cap1 Material: carbon steel ,stainlee steel, alloy steel 2 Size:1/2-48inch3 Standard:ANSI,JIS,DIN,GB/T,ASTM4 Applation: petroleum,chemical,power,gas,metalurgy,shipbuilding,construction,etc..OTHERS:1 Special design available according to your requirements.2 All the production process are made under the ISO 9001:2000 strictly.