Description:There are 4 kinds of subs,Website:http://www.fypedrilling.com, Cable Head, Top Subs, Tandems, Bottom Subs and Crossovers under normal pressure ... .557127127127Tr115×4,Tr65×4103.6×5.7,57.9×3.558Double Pin5154150M43×236.9×3.5596061150M53×246.2×3.55106868140M59×2,M53 ... ,Tr65×460×5.3,64.9×3.551286861772 13/16-ACME,Tr65×457.9×3.55,64. 9×3.551389891773 1 /16-ACME ...