Samlex aluminum adjustable solar mounts allow you to tilt your panel for optimal sun exposure, amplifying solar energy collection by up to 50%. Weather resistant aluminum construction. Choose your incline according to the time of the year – optimal for winter RVing. Over 30 adjustable settings between 0-90o! Samlex Solar RV panel ADJ-28, tilt mounts are adjustable to fit any of the Samlex solar panels from the off-grid Solar Charging Kits. Contains: 2 x 28" Mounting Rails for base support. 2 x 28" Mounting Rails for supporting solar panel. 2 x 14" Aluminum Brackets for setting tilt angle. Carriage bolts & Wing nuts.