5 Pcs Carbon Fiber Tube End Cap 10mm 12mm 16mm 18mm 20mm 22mm 25mm 30mm Chock Plug Waterproof Dustproof For Multirotor RC AircraftDescriptionModel : End capMaterial : PPType : 10mm 12mm 16mm 18mm 20mm 22mm 25mm 30mmCompatible with 0.5-2mm thick carbon fiber tube. If the tube thickness beypond 2mm, you should trim the block and knock it in.Package Included5 x End cap