... Tools Co.,Ltd is one of the top level wellhead christmas tree manufacturers and suppliers,Website:http://www.zztopdownhole.com, with professional ... of API 6A -Consist of casing head, tubing head and Christmas tree -Applicable to all the casing and tubing programs and connection ... ) 2M, 3M, 5M, 10M, 15M, 20K Material class AA, BB, CC, DD, EE, FF Working temp. L, P, R, S, T ...