Casing 1)Grade : J55,K55,L80,N80Q,C90,T95,P110 2)Size :4 1/2", 5", 5 1/2",6 5/8",7",7 5/8",9 5/8",10 3/4",13 3/8",16",18 5/8",20" 3)Wall thickness :6.35 - 12.7mm 4)Thread type :STC LTC BTC 5)Length :R1 R2 R3 6)All our casings accord with API 5CT standard ,and we get the right to use the API LOGO. EMAI:casingpipe09@yahoo.com.cn +86 0317 6886908