The whole set includes 4 food grade balloons and 2 glass mouthpieces with 4 O rings for your Extreme Q vaporizer. All the replacement parts are ensured of high-quality materials and are the absolute way to keep you in check when the original parts of your vape need to be replaced. The Balloon Kit is perfectly clean to give you a smooth vapor with the extra mouthpieces and O-ring attachments that need to be attached. It easily connects with the unit if you prefer to use the Extreme Q with the vapor balloon. This original manufacturer’s part is designed for the Arizer Extreme Q vaporizer which offers a perfect fit all the time.