Floating extractable grid for production of double firing, size 200x250 mm, 12 cavities, double row, with lower strips in long-lasting polyurethanic rubber. Plastified dividing tunnels, plastified central reductions, AISI 304 stainless steel blades specially shaped for a better distribution of the powders into the mould cavity. The blades are coated with pure teflon, having a thickness of 0,2 mm for best anti-sticking effect.