10" Pre-Built BIFLOW Hemispherical Lid with BVV 316SS Full Bore Valves10" Pre Built BIFLOW Hemispherical Lid with BVV 316SS Full Bore Valves (This Lid is fully assembled and Nitrogen Tested for Leaks at Best Value Vacs) This 10" Best Value Vacs Hemispherical lid is fully assembled and nitrogen tested for leaks at our warehouse. This lid comes with 2 BVV 316SS Full Bore Valves with (2)1 4" and (1)3 8" 37 JIC Flares, and compound gauge. These lids are made out of 304 stainless steel and have (1) 1. 5" and (2) 2" Tri Clamp