SIL-TEC is a superior, modern coating process that enhances system performance through the use of embedded fluorine particles. SIL-TEC products run smoother and show less wear under all conditions. The CN-HG701 chain has an asymmetrical design that is directionally dependent. Therefore, the direction of rotation must be observed when installing. The specially shaped links optimize engagement on the sprocket, resulting in even smoother shifting under load. To save weight, this chain features cutouts on the inner links. The side with the marking is the outer side.