The Vortex "Bubble Shield" is a must have for your Cotton Candy machine! The clear bubble provides one hand access to the floss area and it also shields the cooking chamber from dust, insects, and airborne particles. No complex installation is required as the unit was designed to fit "perfectly" onto your Vortex kettle.We highly recommend this unit and suggest every machine be operated with a floss bubble. It is added safety measure that will prevent flying sugar crystals if someone overloads the spinner head. This is guaranteed with a from the Great Northern Popcorn Company!Additional Features: Adds safety and style to your Vortex Cotton Candy Machine.Prevents sugar crystals from "flying" from an overloaded machine!Allows Easy One Hand Operation.Shields the floss from insects, dust, debris, and airborne particles.Full 1 Year Great Northern Warranty. Dimensions: 21"W x 21"D x 14.25"H