Adjustable Flow Control Valve, For Use With Filtered Compressed Air Source, High Pressure Breathing Air Filtration Panels, Compatible with Brand Allegro, Compatible with Manufacturer Part Number 9101-100B, 9101-25B, 9101-50B, 9903, 9904, 9904-W, 9904-WB, 9906, 9909-10, 9909-11, 9911-20, 9911-20S, Includes 1/4 in (0.63cm) Stainless Steel Hansen Plug, Belt