Profile: J. D. Refractories is a manufacturer and supplier of industrial refractory products like rectangular grooved bricks, metal thermocouples, radiant tube heaters discs and industrial thermocouples. Our industrial refractory products include grooved muffle set, element holding bricks, element holding hooks, industrial muffle furnace, heavy-duty muffle furnace, stainless steel tubes, copper Y/K terminals and heating elements. Our rectangular grooved bricks which are in rectangular shapes are provided with inter-locking capabilities. Our range of rectangular grooved bricks are generally used for shielding walls in case of large areas or process.