11-1/4 O.D. Top Sub with BLANK Top Connection with 7-3/4 O

11-1/4 O.D. Top Sub with BLANK Top Connection with 7-3/4 O.D. by 4-1/4 I.D. with 22 Long Fishing Neck and Special long pin threads with O-Ring and Back-Up Ring for use Special HP Pack-Off Assembly. (A12823)for special packer protector to cover 4 packersf/ Logan Series 150 Overshot.