Ortlieb Back-Roller Classic Pannier Bike Bag. One Bag. Red. Waterproof. Spacious and reliable bike pannier bag is built for rear racks. Symmetrical design and slanted shape on both sides, the Back-Roller offers clearance for pedaling and can be used individually either on the left or right side of the bike. Classic rear pannier with roll closure and IP64 waterproof rating. Tool-free hook adjustment with Quick Lock 2.1 mounting system for rack. No strap. Includes integrated inner pocket. Edge protectors prevent contact with spokes and abrasions. Measurements closed: 15" H x 14" W x 6" D - Never Used. See pics for details.