You are buying a pair of Flatliner XI draw modules # F28 for a two cam bow. The modules are for a 28 inch draw length on a standard bow setup. Each module changes the draw length one inch and the larger the number the longer the draw length. Please check your module number to make sure it matches this module series.Thank you for your interest and questions are welcomed????????? If you would like me to recommend a module please email the following, Bow make and model, the draw length now, the draw length you would like, module ID number that is on the bow now, Cam type and limb type if possible, sticker information, and the cable and string post adjustments that are on the cam if any. Please wait for a combined shipping envoice before you pay for multiple purchases. International buyers may request the slower Air Mail, if the total weight allows the item to be shipped Air Mail. Check out my other items !