... drilling rig specification as followsConforming to the requirements of the industry standard SY/T5527.Double pin (male) alloy sub is ... need 90days to manufacture ,these rig parts include: hoook ,swivel, travelling block,rotary table,crown block :ples give us enough ... time for good quality. Swivel,NOV Copy, experience manufacturer,Honghua,Baoji,LSNOW exchanged,warehouse supply ...