This is an RC Solutions Silver Aluminum Roll Cage for the HPI Savage .25 and the original Savage SS (will not fit Savage X trucks).  RC Solutions roll cages are unique on the market. They are made from interlocking 1/8" 6061 T6 aluminum to form a strong shell around the truck. It is so strong an adult can stand on it.

The cage protects everything on the truck - engine, radio, fuel tank, etc. It also supports the body, so bodies last much longer. Cartwheels and flips no longer scrape up the cylinder head and break body mounts, shock towers, and fuel tanks. There is good access to radio boxes, pull starters and filters.