Description: High-quality alloy material, high strength, and corrosion resistance. Flip shock absorption, riding safer and more comfortable. Please remove the battery before replacement, and the installation height should not exceed the safety line. Make sure the minimum insertion mark on the seatpost is inside the seat tube of the frame. *Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the actual item. For manual measurement, please allow a 1~3mm error.