Products include: 1 Pcs Magnetic Connector & Surface Mount Dustport Steel Ring Receive.2 Pcs 2.5" Rubber Couplers & Steel Ring Port Receivers.3 Pcs 4" Steel Ring Port Receivers.4 Pcs 4" Rubber Couplers.8 Pcs 4" Hose Clamp & 4 2.5" Hose Clamp Fits for Model: 4" & 2.5" Woodwork Shop Vacuums Dust Hose, Enable Quick Switching Of Hoses Between Devices Product Features: Includes Magnetic Connectors In Both 2.5-Inch And 4-Inch Sizes, Along With A Magnetic Dust Port Steel Ring Receiver, Enabling Quick Connection Of Any Hose To Surface-Mounted Receivers for Fast And Reliable Attachment 2.5"-4" Specifications Allow Easy Connection To Any Hose By Simply Docking The Magnetic Connector With The Surface-Mounted Receiver, Compatible With Most Dust Collection Equipment for Broader Adaptability. Please Check The Product Size and Product Serial Number Carefully Before Purchase to Avoid Wasting Your Valuable Time Magnetic Dust Collection Fittings W/Surface Mount Dustport Steel Ring Receive for 4" & 2.5" Woodwork Shop Vacuums Dust Hose, Enable Quick Switching Of Hoses Between Devices Color: As Shown Material: Metal Package Contents: 1 set * Magnetic Dust Collection Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.