Product Description The UST valve (square stem version) with removable valve core (RVC) facilitates the use of sealant. Mavic recommends replacing UST valves once a year to ensure that the UST system is reliably sealed. Specifications:Application:Cross Country, All MountainValve Type:SV (Sclaverand/Presta)Valve Length:33 mmCompatibility:especially for Mavic UST rims/wheels (= tubeless rims/wheels) before 2012Manufacturer Number:99528201 Contents:1 x Manufacturer: Mavic Group Germany GmbH Geigelsteinstraße 10 83080 Oberaudorf Germany info@mavic.com