N-FAB RKR Rails Provide superior protection while enhancing the look of the vehicle. Constructed using 0.12 in. wall, 1.75 in. tubular steel, RKR Rails are treated inside and out for extra corrosion resistance so you know they are built to last. Finished with a durable textured black powder coat, N-FAB RKR Rails look as good as they perform both on and off-road. Making a great product even better, N-FAB offers optional Detachable Steps that are compatible with all N-FAB RKR Rails and Factory Toyota FJ Rock Rails. These steps offer convenient vehicle access for daily use and can be removed to allow for maximum group clearance when off-road.\nRKR Step System - Cab Length (2 Step Mounts/2 Steps per Side) - 1.75 in. Rails - 2019 (New Body Style) Chevy Silverado/GMC Sierra 1500 Crew Cab - Textured Black\nBefore purchase please verify if you have New Body Style or Legacy (Chevy)/Limited (GMC) on 2019 Silverado/Sierra 1500 -- This part is for the New Body Style\n2019 Chevrolet Silverado 1500 High Country Crew Cab Pickup, 2019 Chevrolet Silverado 1500 LT Crew Cab Pickup, 2019 Chevrolet Silverado 1500 LTZ Crew Cab Pickup, 2019 Chevrolet Silverado 1500 RST Crew Cab Pickup, 2019 Chevrolet Silverado 1500 SSV Crew Cab Pickup, 2019 Chevrolet Silverado 1500 WT Crew Cab Pickup, 2019 GMC Sierra 1500 AT4 Crew Cab Pickup, 2019 GMC Sierra 1500 Base Crew Cab Pickup, 2019 GMC Sierra 1500 Denali Crew Cab Pickup, 2019 GMC Sierra 1500 SLT Crew Cab Pickup