Pyrex 100th Anniversary Limited Edition Embossed Pie Plate. It is a collectible item commemorating Pyrex's 100th anniversary. The plate is made of clear, high-quality, tempered glass and features an engraved design. It measures 9.5 inches in diameter and is suitable for baking pies. This plate is safe for use in the oven, microwave, refrigerator, freezer, and dishwasher