SETRAB - Fan Kit for Series 9 CoolerSetrab offers a wide variety of Oil Coolers in multiple configurations. Some series have fewer, and other series have more rows and are up to the owner of the vehicle to best narrow down the cooler for your application. There are 1 Series (up to 72 Rows), 6 Series (up to 60 Rows), and 9 Series (up to 48 Rows) options currently available. The ProLine STD is the is the mid most size, offering solutions for high performance and high vehicle power output