The Neb Kit 600 comes with the main components that make up a nebulizer treatment. This kit outputs aerosolized medication with 80% of particles within the respirable range to give you a very effective treatment. Included with this kit is a reservoir tube that improves your treatment by preventing the medication from escaping into the outside air. An adult mask is also included with this kit to make it easier for you to receive your treatment, as you're not required to secure a nebulizer between your lips for the treatment's duration. As a disposable nebulizer kit, this product must be replaced after 2 weeks worth of treatments. Features: This nebulizer kit features everything you need, except the compressor, to take an effective nebulizer treatment. Comes with a reservoir tube and an adult mask to help you get the best treatment possible Outputs 80% of particles within the respirable range. This neb kit is disposable, meaning it must be replaced after 2 weeks of treatments in order to maintain the most effective treatments possible.