Topeak QR Fork Drybag. Features: A quick release weatherproof fork bag enabled by the included bolt-on mount Features include a roll down top and air release valve so bag does not balloon If fork lacks mounts a Versamount can be used. See TZ-8815 Specs: Model: QR fork drybag Capacity: 354 cu in (5.8L) Dimensions: 43.5x18x16cm Color: black Weight: 205g