Mitas Tire Tubes Standard duty inner tube for motorcycles, scooters and mopeds. Made from a high quality butyl compound with a 1.5mm thickness. Features: Made from high quality butyl compound 1.5mm thickness for heavy duty applications Premium valve construction with galvanized Stem includes two washers, metal + rubber cap Packaged individual pouches with nitrogen-rich atmosphere for extended shelf life Stem Types: Tr-4 & Tr-6 - Straight metal stem (8mm diameter) Js-87 - 90 degree metal stem (10mm diameter) Note: Tr-4 and Tr-6 valve stem styles can be used interchangeably.