The Continental Race 28 tube.
 
All purpose Butyl inner tubes, seamless construction, with a mould-cured vulcanisation, to ensure uniform roundness and give a smooth ride and handling with renowned Continental quality, each and every inner tube passes a stringent 100% quality control inspection.
 
Available with 42mm and 60mm Presta stem length.
Wheel Size: 700x18-25mm, 700x25-32mm
Presta 700x20/25 (60mm), Claimed Weight: 105g