1)Annular BOP 2)H2S Trim 3)Packing unit can be interchanged by Hydril's 4) API SPEC Q1 and API SPEC 16A and ABS 21 1/4" 2000psi Annular BOPAnnular BOP is simple and requires less-maintenance. Low profile saves the installing space. Packing unit has enough rubber volume and long service life. Wide losing rang, losing various sizes of drill tools and wire line less than Bop bore According to the latest API Spec 16A standard,NACE MR-01-75andquality standard of  ISO 9001 H2S Trim. Packing unit can be interchanged by Hydril's Top connection: 21 1/4" 2000psi 6B R73 CRA Studded or Flanged Bottom connection: 21 1/4"2000psi 6B R73 CRA  Flanged or Studded Weight:7769kg Dimension:1488 x 1488 x1395

21 1/4" 2000psi Annular BOP