I ordered a serpentine belt for my truck. The options were with or without AC. I chose 'with AC' as that is the setup I have. When I received the belt and tried to install it I found it to be too short. After digging into the matter I found that my truck has a vacuum pump that was not in the description or options. Return was refused because I tried to install the belt and got a little grease on it. The problem is that the description was not accurate in the first place! I now have to wait for who knows how long to get the belt I ordered from somebody else.