Heavy-duty plastic construction. 4 shelves can be adjusted to multiple heights. Doors swing open easily and close securely. No assembly required. Putty finish. About Sterilite Sterilite strives to keep your home organized and at its best - all the time. For over 50 years, they have been innovators of various types of home storage, from food containers to heavy-duty tote boxes. Sterilite is the world's largest independent manufacturer of distinctive plastic housewares. Their product line features items in whatever shape, size, and color required to help you keep your home tidy and together.