Perfect for breathing new life back into your tyre, this inner tube is engineered for longer air retention for smooth and dependable rolling performance. Coming equipped with a 40mm Dunlop valve, it offers simple installation and inflation. Schwalbe has also put this model through a rigorous testing process to ensure consistently high performance on your ride. Reliable Inner Tube Each tube is inflated at the Schwalbe factory for 24 hours and tested for leaks, which ensures high reliability. Retains Air Longer In manufacturing, Schwalbe ensures a very high butyl content and a very high material purity. So Schwalbe tubes retain air pressure considerably longer.   Manufacturer's Part Numbers: 10923311 Black/Black Dunlop 26" 1.75"  10432341 Black/Black Dunlop 26" 1.0-1.5"  10925311 Black/Black Dunlop 26" 1.5 -2.4"  10427611 Black/Black Dunlop 700c 18-28"  10927611 Black/Black Dunlop 700c 18-28 WP"  10930311 Black/Black Dunlop 27.5" 27.5-29" 29" x 1.50"  DV15 Black/Black Dunlop 700c DV15  DV12A Black/Black Dunlop 700c 26" 1.00 - 1.50"