The Rubber Blow Hose Adapter Kit includes 3 rubber adapters designed to help attach your blow hose to your blow tube. This kit works best with a 1/4" swivel. Kit includes: One Inside Adapter - designed for the inside of a tube, with an approximate 8mm inside diameter. One Outside Adapter - to fit over tubes up to 13mm. One Outside Adapter - to fit over tubes up to 16mm. With this convenient kit, attaching your blow hose to your blow tube has never been easier!