The tray stackers are made of silicone material, which is durable for long time use. The silicone tray stackers is a nice helper for your home, and will bring much convenience to your life. Features - Color: Black -Material:Silicone - Size: 5.00X3.30X2.50cm/1.97X1.30X0.98in - Baking sheet stackers clips, Unique design allowing them to stand firmly above the kitchen countertop, prevent tilting and falling. - Baking Sheet Stackers are made of silicone, it is solid and durable, and can be reused. - The tray stackers are stackable, saving you space in the refrigerator or freezer dryer, It your food preparation more convenient. - The baking sheet stacker is easy to use. Just install on the corners of the plate, is very easy to stack. - Simple to use, the baking sheet stacker is easy to assemble, easy to carry and store. Package list: 4 x Cookie Baking Sheet Stackers