The KRPE-RB-SPMNT-100 is the roll bar mount switch panel enclosure without top cover needed to install a standard drag race switch panel to the piece of 1.625” diameter tubing.
If you prefer your switch panel enclosure to have a top panel, take a look at the KRPE-RB-MNT-200.
If you purchase the KRPE-RB-SPMNT at the same time as one of the wiring kits, it can be combined in the same shipping box and will ship for free to a continental US address.