Check the listing for details. Bow Draw Length Modules = REV F 80% D-S-CAM - Archery Mods. Condition: Used. Listed at 49.99 USD. CLEAR ARCHERY INC. Proudly serving your online archery needs for over two decades!! Unfortunately, I am no longer able to place a phone number here in my listings as per eBay's policies so that we can discuss your purchases by phone. This drastically cuts into my ability to provide the best customer service possible, as I have done for so long here and through my own online storefront. This though is the new eBay policy, and there is nothing that I am able to do about this. I will still though do everything that I can to assure that your receive the bow package you are most interested in, set up in a way that best suits you, while providing the best customer service possible despite the limitations eBay has chosen to place on everyone. Modules REV F 80% D-S-CAM These mods are part of a full shop of inventory recently purchased.Please refer to the photos, as this is the actual modules that are for sale. I know nothing more at all about them. Please do not inquire about purchasing other mods or cams that you do not see listed here in one of my listings through eBay. If I have any that I am looking to sell off they are already listed here. I am not looking to sell off any other cams that I have in stock other than those currently listed for sale. Please let me know if you have any other questions whatsoever. Thank you, Tom Clear Clear Archery Inc.