The steel cable of the lock is made of high quality zinc alloy, which is strong, not easy to break and durable to use.This lock features strong elasticity and it can extend up to 1.1 meters.With the designed of small size and 4 digit password, this helmet lock is easy to carry and use, also it can provide an reliable protection of your motor helmet. Item Name: Motorcycle Helmet LockMaterial: Zinc AlloyFeatures: Durable, Anti-theft, 4-Digit PasswordPassword Lock Length(After Stretching): 1.1m/43.30" (Approx.)Steel Cable Width: 3mm/0.11" (Approx.) Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x Helmet Lock