Material: Made of 6061 aluminum alloy , providing excellent corrosion resistance and a stable structure. Lining bag crafted from waterproof, wear-resistant Oxford fabric , durable for long-term daily use. Capacity Large volume design for more grocery or cargo loading. Zipper pocket on the lining bag for extra storage and convenience. Use Scenarios Ideal for urban commuting or long-distance travel. Designed to carry your goods securely wherever you go. Compatibility Velotric Discover 1 Plus, Discover 2, Discover 3, Discover M, Summit 2 (Modular Rear Rack Required) , Tempo(Rear Rack Required), Nomad 1, Nomad 2, Nomad 2X, Nomad 1 Plus, Summit 1, Fold 1, Fold 1 Lite, Fold 1 Plus, Breeze 1, Go 1, and Packer 1