Products Search by Part Number Products>Vacuum Products>Vacuum Regulators>IRV>IRV10/20, Bottom Bracket Assembly IRV10/20, Bottom Bracket Assembly Mounting bracket for IRV10/20 Series Vacuum Regulators Mounting bracket for IRV10/20 Series Vacuum Regulators Includes mounting screws Configuration Options Select Product Options Select values from the drop down lists or make appropriate selections to configure the part number. Model -- Pick an Option -- 10 (IRV10, IRV10A) 20 (IRV20, IRV20A) Options in: Gray are not compatible with other selected option value. Red conflict with another selected option value. Amber are not recommended.