1Durable and Wear Resistant: Steel alloy ball joints with chrome plated surface have high hardness and durability, are corrosion resistant and rust proof, and have sealed bushings to provide long lasting wear and service life. 2Shock Absorption and Sound Attenuation: The 14mm ball head is equipped with a nut and a tip, which can solve the problems of abnormal noise in the front suspension, excessive vibration in the front of the vehicle, and improve driving comfort. 3Direct Substitute: The thread of the ball joint is 14mm, which can perfectly replace the original damaged and worn ball joint, providing your vehicle with better riding performance. 4Simple Installation: The installation program of the ball head is simple, and it can be installed independently without special tools or professional installation personnel, and can be completed in a short time. 5Fitment:14mm ball joint is perfect replacement for Jinling Jla?21B 250cc Quad Atv. Please confirm whether it is suitable for your model before perchasing in case of any trouble.