The Lazy Susan Revolution Expansion Pack includes 2 straight tracks and 2 trays, perfect for organizing your kitchen storage and organization. This small round lazy Susan is made of white plastic, featuring a free-standing mounting style for easy use. With reusable and expandable capabilities, as well as being easy to clean, this product offers convenience and versatility for your kitchen needs. The 8.5-inch diameter and assembly required feature make it a practical and efficient addition to your home.