12" Pre-Built BIFLOW Hemispherical Lid with BVV 316SS Full Bore Valves C-BITE You simply set it and

You simply set it and forget

2 on the lower back

Lifetime guarantee

it allows you to set a minimum speed at which the fan will constantly run and would only increase when triggered

12" Pre-Built BIFLOW Hemispherical Lid with BVV 316SS Full Bore Valves C-BITE You simply set it and12" 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 12" 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 (3) 2" Tri Clamp ports with