Everything needed to fix a flat on a large volume 26" or 29er mountain tire, housed in a compact package that fits conveniently on the seatpost. 25g CO2 cartridge included (will ship FedEx Ground). Fits seatpost diameters from 27.2mm to 31.6mm. Plastic front clip holds two glueless patches. Silicon body holds 25g cartridge, 90-degree head, and two-sided tire lever. Weight: 138g