I bought 100 pieces of profile pipe, almost cut into 3 meters. The cut is rosy, with small burrs. It's just in case. The metal itself is normal, according to GOST. It doesn't burn out on a semi-automatic.
Everything is delivered, the prices are inexpensive. We ordered fittings and a grid for the insulated plate. Plus various little things like wire and fasteners. The order amount is considerable, we got a discount.