Check the listing for details. Strother Archery SX1 Hyper-S Cam #1 Fast Draw Length Module Set- SX 1. Condition: Used. Listed at 59.99 USD. CLEAR ARCHERY INC. Proudly serving your archery needs online 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. These mods were removed from bows to change the draw length on those bows when sold. They are part of a full shop inventory I recently purchased. My knowledge of them is pretty limited, so please see the photos as this is the actual set for sale. This is a #1 Fast draw length module set for the Strother Archery SX1 bow that was equipped with the Hyper "S" Cams. These modules were originally available in either a "smooth" or "fast" version. This listing is for the exact set that is shown. Please do not inquire about purchasing other parts, 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.