FoodKing Bubble Cover Bubble Shield Clear Plastic Bubble 20.5 Inch for Cotton Candy Floss Machine (Cotton Candy Machine Bubble Shield) Durable polyester (PETG) for high impact resistance; Clear visibility This item is plastic bubble only, does not include cotton candy machine. Fits 20.5 inch diameter bowls, which is the most common size for cotton candy machine. The bubble cover can keep the cotton candy from flying out, and keeps bugs from flying in. Increases sales but keeps children safely away, perfect accessory to your cotton candy machine.