Due to high demand please allow 2-3 weeks for delivery. This kit includes everything you need to get started: Three 4" Magport magnetic fittings, two short sections of 4" diameter flex hose, and five hose clamps to keep everything in place. Use this kit to fit Magports to your jointer and planer, and one on the end of your hose that will service both machines. Or, like in the photos, a single hose can service both your bandsaw and your thickness sander. The 4" unit has an OD of exactly 4".