Retrax Retrax IX - 21-26 F150 6'7" Model 30379Retrax Retrax IX 21 26 F150 6'7" Model 30379 The 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