Bought used - opted for this version of a ramp for my pack of aging herding dogs - 50 # Aussie/BCs and a 75# Bouvier des Flandres - who were beginning to tear my aging back. Made in USA from  heavy duty plastic by the same folks who made the floor mats I got for the truck (Weather Tek). Folds easily. The weight is necessary for the sturdiness I need (plan to throw in the truck bed when not being used). No metal to rust. Textured ramp built in (no peeling). Altogether the ramp is an ideal product I was very pleased to buy at 60% retail cost.