Framework is aluminum tubing.  Surface is aluminum composite material. All hinges and supports are also made of aluminum. This makes it lightweight and weather-resistant. Limited height adjustment. Supports are not needed.
Rubber: Glue and rubber are mixed together then applied to the surface. This leaves an extremely durable long lasting surface.
Painted Sand Textured: Painted with a exterior paint and a heavy sprinkling of sand for texture.
 
NOTE: this product is made to order with typical queue times of 10-14 weeks