Features: In the process of bending,slider spark grinding knee bag and ground contact, will produce very large, very beautiful sparks. Provides impact for protection and knee stabilization. Suitable for motorcycle, cross-country cycling and other outdoor sports. When in use, it is directly pasted on the buckle on the knee of the racing pants, and the position can be adjusted according to your own adaptation point. brand new and high quality It is used for training of professional motorcyclists. During the race, when passing through for sharp corners, the landing point of this sliding block on the knee is used to find the riding transition point, and the violent sparks are wiped out. Specifications: Material:Plastic,Metal Number of Firepower Points:12,20(optional) Color:Black,Blue,Green,Orange Size:Approx.16.5x12cm/6.49x4.72in Net Weight:400g Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2Pcs Motorcycle Knee Pads