Product Name: Bicycle A Horn Handle Cover Product packaging: Neutral paper box Packing quantity: 100 pairs Gross weight of packing: 30.7KG Packing size: 68 * 44 * 38CM Reminder: The secondary handle material is aluminum alloy. Please do not forcefully tighten the screws during installation, as excessive force may cause the threads to slip. If you find that the secondary handlebar is not tightly installed during installation, try moving the bicycle brake lever towards the middle of the handlebar until the handlebar tube is aligned with the outer opening of the secondary handlebar, and then tighten the secondary handlebar screw.