TPI 2” Nerf Bars are made from the same tubing as our roll bars, 11ga., for maximum clearance and strength. Bolts to frame or you can weld for maximum support. TPI 2” Nerf Bars are superior to the 3” bars found elsewhere. #1, they are much stronger because they are made from 11 ga. roll-bar tubing, #2 they hug the running board for trail clearance and #3, they give better clearance below for rock protection. Black powder coating.