Schwalbe AV19 40/62584/635 Bicycle Inner Tube 40 mm MTB 29 Inch Schrader Valve Product Specification: Design: Butyl. Hose size: 29 inches. ETRTO: 40/62622/635 Hose code: AV19 Valve: Schrader Valve Valve Length:40mm Weight: 220 g. Container/Content: 1.