The dkn r 400 rowing machine has an elegant design and truly sturdy construction that makes it one of the most stable rowers around setting new standards for home training rowing machines the drive belt is produced of the same material as used in the automotive industry making it not only very durable but also very silent when in use the dkn r 400 rowing machine features a double resistance system combining an airfan with a magnetic resistance connected to a 11 kg flywheel the r 400 is o