The product has the ability to be not easy to rust and corrode due to its protective cover design.The product has the ability to be wound on the bicycle, which is convenient to carry.It is made of metal and plastic materials, green and environmentally friendly, anti-aging, no peculiar smell, we strictly select materials and use environmentally friendly materials. The product adopts a five-digit code lock design, which has a higher safety factor.The length of the chain lock after being rolled up is 16cm, the width is 15cm, the height is 4cm. The straightened length of the chain lock is 100cm.It is suitable for bike, battery car, motorcycle, etc.Item Name: Bicycle LockMaterial: Plastic,MetalMaximum Stretch Length: 1mSpecification: BK041AFeatures: Anti-theft, Portable, UltralightSize Details: Chain Lock Roll up Size: 16cm x 15cm x 4cm/6.3" x 5.91" x 1.57" (Approx.)Straightened Length: 100cm/39.37" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bicycle Lock1 x English and German Bilingual User Manual