The Aero Foot Pack provides a good fit for Thule's multi-purpose roof-rack systems mounted on vehicles without external rain gutters. Wide foot pads help distribute the load for better stability. Made of long lasting, corrosion resistant galvanized stamped steel. Fit Kit, sold separately, required for installation. No tools necessary for set-up. Please consult the Thule Fit Guide to match the correct Thule parts with your vehicle. 91021400573 19572600012 400XT