Product Material: aluminum alloy, PVCSize: diameter 12mm, length 300mmColor: pure black, sky blue, orangeQuantity: 1 piecePackage content: 1 * bicycle ring lock1. Material: High strength aluminum alloy locking head, anti-theft, rust and corrosion protection, strong and sturdy. Seven-core protection, increased safety factor. Lock body with PVC sheath, comfortable and soft, prevents the frame from being scratched and extends the service life.2. Keyless Locking: No key required, just press lightly, the bike will be locked, convenient and quick. The outer layer of the key is wrapped in ABS plastic, strong and sturdy. Circular groove design, difficult to copy, increase security. Each key has its own number, a low probability of being unlocked by other keys of the same type is more secure and theft-proof.3. Locking options for several bicycles The bicycle lock offers different types of locking with all functions. You can lock the rear fork or lock the rear wheel, besides, it can also be used as a disc brake lock. You can use two or more locks to extend the bike lock and lock multiple bikes together.4. Portable and easy to carry The length of each lock is 300mm, the diameter is 12mm, the, soft and convenient, mini and portable. You can slip it in your pocket or hang it on your arm or bike frame. It can also be hung under your bike saddle.5. Widely used Ideal for bike lock, mountain bike, racing bike, city bike, MTB, perfect for your riding trip. offer various bike bags, bike lock, meet your cycling needs.