The Tactical Xtreme TX4R radial mount four-piston calipers are engineered and purpose built for severe duty service on heavy duty Trucks, SUV's, and Class 1, 2, and 3 Armored Vehicles up to 14,000 lbs. GVWR. The combination of the forged aluminum body, stainless steel pistons, large pad volume, and the ability to accommodate brake rotors up to 1.50” thick, make the TX4R the ultimate choice for high strength, lightweight, and tactical level braking capacity for all types of highway and off-road extreme duty service applications. TX4R calipers have a hard anodized finish on base models with options for gloss black or red powder coat.