The Polyvance 6049-C Nitro Fuzer Lite is designed for budget-minded body shops with a lower price point without compromising capability. This unit offers automatic low-flow cutoff to prevent heating element burn-out; precision flow control on both air and nitrogen sides to allow for welding anything from super-thin tabs to heavy tuck side panels; analog flow meter for repeatable welder setup; 13 types of plastic welding rod; and made in the USA construction. There is a manual switch between air and nitrogen gas, the cart requires assembly by the end user and free courtesy training is not included (there is an included sheet of QR codes techs can scan with a smartphone for instant, on-demand video training).