sengWare 9-Inch Blueberry Square Salad Plate, Set of 4, Dark Blue sengWare 9-Inch Square Dinner Plate, Set of 4 sengWare's exclusive proGrade material. Unique blend of all-natural clays free of metal components. Feel the quality difference in the weight. High-heat vitrified manufacturing process. Hand glazing technique. Vibrant colors, fun designs and durable quality. Elegant shapes perfect for everyday and formal dining. Collection features over 20 unique items for endless mixing and matching. Fun and functional design for multiple usage and ease of handling. 100% lead and cadmium-free. Oven to table safe. Microwave, freezer and dishwasher safe. Non-porous, lead and cadmium free glaze prevents residual stains or food odors. High-fired vitrified construction resists chips and cracks. sengWare proGrade products are covered by industry-leading five-year warranty from the date of purchase. The warranty covers chipping, cracking, crazing (small cracks on the surface) and fading from normal household, non-commercial use.