Look carefully at the Boa dial on your product. It may be printed with "boa lacing system" as pictured above, or if it is several years old it may have a logo sticker from the manufacturer of the product (like K2, Vans, DC, etc.). This is a Series 20 High Power Reel and is most often used on the tongue of Snowboard boots, Snowmobile boots, as well as on wakeboard bindings, fishing boots, and many other products. These are your parts. Note: We automatically upgrade the replacement to a Series 30.