Because the front pads were too small and could not be used and I had the wheels off I had to travel to local parts house for appropriate pads. I am now expected to pay the shipping on the return. The rear pads were the correct size and worked fine. Because of this problem I will never buy from Rock Auto again. My 2006 Dodge Ram 1500 has dual piston calipers on the front brakes and single piston calipers on the rear. All the pads were the same size. However, the data I provided as to truck information should have covered all the information for you to supply the correct pads. There was no questions about number of caliper pistons for each set of wheels in the requested vehicle information.