Retrax 21-23 Ford F-150 Super Crew/Super Cab/Lightning (5.5ft Bed) Retrax IXThe Retrax IX is a flush mounted retractable tonneau cover constructed of durable aluminum slats linked by a strong elastomer hinge, helping to eliminate the opportunity for water and debris to enter your truck bed. When combined with the UV resistant matte finish powder coat, the cover helps keep your truck bed and cargo protected and secure in the roughest of conditions. The Retrax IX's convenient release handle allows the cover to roll into a