These replace silent chains on most snowmobiles. They areavailable in widths of 11, 13 and 15. Lengths available are62 links to 98 links. To determine the width you need to countthe amount of plates and to determine the length, you need tocount the amount of pins. They are offered in single, double,and triple chains. They are used on Arctic Cat, Polaris,Ski-Doo and Yamaha.