BOPS & Accessories Listings 16-3/4” 5M Shaffer Spherical Annular Wedge Cover Type – Used By admin 9 years ago BOP, 16-3/4” 5M Shaffer Spherical Annular Wedge Cover Type, Flange Bottom x Studded Top *Can be rebuilt if needed Shaffer Spherical Wedge Cover Type 16-3/4″ 5M Continue Reading Previous National Type EB Deadline Anchors – UsedNext Varco BJ, Blohm & Voss – Weldless Elevator Links/Bails – Used