This 326-PC blue lid fits the 4 quart Pyrex mixing bowl. This durable plastic lid/cover is reusable, and is made of non-porous, BPA-free plastic and hence you do not have to worry about this absorbing all kinds of food odors and flavors. This lid can be cleaned with ease on the top rack of dishwasher and is appropriate to be used in a microwave, freezer, and fridge. This lid/cover protects the food during storage, heating, and reheating. You can use the lid to cover mixed ingredients during food prep, and to store the cooked leftovers after your meal. Please check the bottom of your dish for the number “326” to ensure this lid is a proper fit. This Pyrex lid is NOT compatible with Anchor Hocking products.