The N-FAB Nerf Bars have a patented N-FAB hoop step design featuring a 3″ Main tube diameter, .084 Wall Steel Tubing. The patented drop-down step design and location is engineered to allow for ease of access to stock or lifted vehicles.This application fits high & tight to the vehicle body for a clean, modern style and protection from road debris. The N-FAB Cab Length Nerf Bars feature a fully welded 1-piece construction for strength, long lasting durability & ease of installation.