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A type: Pack off is automatically energized with casing weight Seal is reliable, safety and convenience. It is apply for deep wellhead service Size 5-1/2' 7' 9-5/8' B type: Casing hanger is used for connecting casing head and surface casing through slip tightening casing with help of external force. Installation and remove are convenience and working is reliable and safety Size 13-3/8"20"
