The NU2U- Revolutionary Flame guard is an incredibly ingenious device provides huge amounts of heat given the super thick 3/8" Low Carbon Steel while holding back the flame allowing the crust to rise perfectly without the unwanted burnt HOT SPOT so common with these ovens. The laser cut and CNC formed Flame Tamer/ heat diffusing plate is designed to fit perfectly around the flame nozzle and provides support so that the flame guard will never fall over. Tested and proven the NU2U Flame Tamer & heat diffusers works wonders and takes a lot of the guess work and chance out of baking the perfect pizza! For more great products visit NU2UProducts.com proudly made in Canada. Compatable only with Gozney* Roccbox Pizza Oven.