The Pit Viper Power Draft Blower is our latest and most versatile blower. With the damperfull open, you can run a medium size offsets, large vertical smoker or extra large ceramic grill. Throttle the damper down for kettles, bullets, and smaller ceramic grills. The Pit Viper is a great choice for people who have multiple cookers of different sizes. The Pit Viper has a built in hook for mounting a BBQ GURU Control unit.