Cakesupplyshop 10inch 12inch Two Tier Round Cake Stacking Kit -Seperator Plate, 16inch Tall Cake Box, Silver Drum, Columns & More Suitable for stacking a 12inch Botttom and 10inch Upper Double Layer Cake Includes 1 Carry Box (16inch x 16inch x 16inch), 1 Silver Corrugated Board, 4 Plastic Columns , 1 White Plate for upper (tier), 1 Stripe Box Covering and Box Instructions. Plastic Columns fit the white upper tier plate for secure stacking and easy transport.