... application to gas burner, grill, oven, BBQ, cooker cooktop, water heater, infrared heating and etc.Surface shape: smooth, rhombus, wave ... from 1.649 mm-2.086 mm. Specification of infrared ceramic plaque: Size(mm)Fuel gasHoleCells/in2surface patternNGLPGSquareRoundSquareRoundPlaneDiamondCinquefoilCorrugationΦ ... 280-520-√√-√Φ135√√√-280-520-√√-√Φ160√√√-280-520-√√-√ Infrared ceramic plaque for gas cooker