A necessity to each and every STAG rack, the base unit comes equipped to hold BOTH of the STAG attachments (and any future attachments).
One STAG Base Unit (four individual Base Unit STAG Rack components)
Four Secure-Lock handles
Eight 6" Vacuum Cups (pre-installed)
Vacuum cup cleaning kit
Note: Remember, you only need to purchase one base unit for your STAG rack. The only time you would want to buy two base units is if you wanted to be able to use your attachments on multiple cars at one time.