Get smooth shifting under high-load pedaling in muddy conditions. Sil-Tec is an ultra-low friction surface treatment from Shimano(R). The plating process improves system performance through the use of imbedded fluorine partials. Runs smoother and wears longer in all conditions. Directional chain designed for mountain bikes. Mud-shedding design provides consistent shifting performance in gloppy conditions. Chrome treated link pin. Super narrow HG-X, XT 10-speed chain. 116 links.