Product Description Specifications:Application:City, Kids'ETRTO:33-390 to 46-406Tyre Dimensions:20 x 1.3 to 20 x 1.8Inner Tube Material:butylValve Type:AV / Schrader 34 mmValve InformationTubes are available with various valve types. Choosing a valve is dependent on application and the rim's valve hole diameter. AV / Schrader Valve: Synonyms: Auto Valve (AV), Schrader ValveOuter Diameter: 8.5 mmModels:20 x 1.3-1.8 AV / Schrader 34 mm Valve Type:AV (Auto / Schrader valve)Valve Length:34 mmManufacturer Number:411696Contents:1 x Manufacturer: Michelin Reifenwerke AG &Co. KGaA The Squaire 17 – Am Flughafen 60549 Frankfurt am Main Germany info@michelin.com