The product description and photo was for Continental 32-507 inner tubes with Presta valves, 24-inch diameter. This is the type of tube that would be used in a typical child's 24-inch cyclocross bike (with narrow tires). Instead, the tubes in the box were much larger (maybe for a small mountain bike tire) and had Schrader valves, not Presta valves. Furthermore, the core of the Schrader valve was missing. After having waited weeks for the shipment to arrive from the UK, we had to send them back and pay the postage ourselves. We were told that we'd be reimbursed "up to $20" for the postage, but I don't know if that would even be enough to cover it. Very disappointing.