Product Description Lightweight inner tube for touring use. Specifications:Application:City & TouringETRTO:32-622 to 47-622 / 32-630 to 42-635Tyre Dimensions:28" x 1.5 to 28" x 1.75 / 27" x 1 1/4 to 28" x 1 1/2Inner Tube Material:butylValve Type:SV / Presta 42 mm, AV / Schrader 40 mm Models:27-28x1 1/4-1.75x2 AV / Schrader 40 mm Valve Type:AV (Auto / Schrader valve)Valve Length:40 mmManufacturer Number:0182051 27-28x1 1/4-1.75x2 SV / Presta 42 mm Valve Type:SV (Sclaverand/Presta)Valve Length:42 mmManufacturer Number:0182071Valve 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 mm SV / Presta Valve: Synonyms: Sclaverand Valve (SV), French Valve, Presta ValveOuter Diameter: 6.5 mmOther: all Continental tubes with a Presta valve can be unscrewed. (To lengthen the valve, add anti-flat agents, etc.)Contents:1 x Weight: universal | Schrader Valve (AV) | 32-630 to 42-635 | 27-28x1 1/4-1.75x2 Schrader 40 mm | 40 mm: 100 g universal | Presta Valve (SV) | 32-630 to 42-635 | 27-28x1 1/4-1.75x2 Presta 42 mm | 42 mm: 100 g Manufacturer: Continental Reifen Deutschland GmbH Continental-Plaza 1 30175 Hannover Germany info@conti.de