This is one of our most popular tube sizes, 700c x 23-25mm (27 x 1-1/8") offerred here in a Superlight version. Q-Tubes Superlight tubes for lightweight high performance featuring removable valves and .76mm wall thickness, with Q-Tubes reliability. Presta valve. Price is for 1 tube.
Q-Tubes are made by Kenda, one of the world's most respected bicycle tire and tube manufacturers.