This is an adjustable wind-deflector type roof spoiler designed for Tamiya's 1/14 scale radio controlled Tractor Trucks. The realistic Roof Spoiler not only enhances appearance but is also functional as seen on full-sized trucks. The Roof Spoiler can be mounted easily using double-sided tape or screws included in set. Vital components such as spoiler-rails and spoiler-rod use metal parts to attain necessary strength while the deflector panel and cross-member is injection molded for scale appearance. Spoiler angle can be easily adjusted between 30 - 90 degrees allowing you to select the desired angle. Tamlya offers other tractor truck optional such as Semi-Trailer, Tank-Trailer, and Electrical Unit Set to support your trucking desires.