The NEW Aheadset ZS ZeroStack Internal 1-1/8" Threadless Headset AHDZS286AK is a high-quality bicycle component designed for sporting goods enthusiasts. Made by the reputable brand Aheadset in Taiwan, this headset features a sleek black color and is specifically designed for threadless external cup (EC) steering tube diameter of 1 1/8 inches. With its innovative ZeroStack technology, this headset provides a smooth and reliable ride for cyclists looking to upgrade their bicycle performance.