2-1/2" diameter steel tubing wide body frame, 3/16" thick steel fully welded mounting brackets with integrated 3/8" threads, Modern angular style designed removable 16 ga. galvanized skid plate, Integrated vertically adjustable mount for a single row 20" . RC3 LR Frame comes with a Limited Lifetime warranty on materials and construction and a 5 year warranty on the Textured Black Finish.