Check the listing for details. Diamond Archery Draw Length Module DM8. Color: Black, Condition: Pre-owned. Listed at 8.00 USD. I have multiple available, sale is for ONE. You will receive ONE of the modules shown in the photo's. Great shape. Some show light screw markings so these may have been used. Light scratches from sitting around a container together loosely. Please refer to your manual or to the manufacturer to see if this part is what you need, I will not be able to determine if this is part goes with your model. According to a 2008 chart I have, this size may fit The Rock 23". Newer models change over time, so again please refer to your owners manual for correct sizing. TERMS OF SALE Most of my items come from auctions, garage sales or estate sales. I do not smoke in my home, but there may be items that come from a smokers home. If I notice the smell, I will mention that in my listing. If it's not mentioned that doesn't mean it is for sure from a smoke free home, I just couldn't smell it. I do have one dog and one cat. I keep them separate from the merchandise being sold. There may possibly be a stray hair I might not see. If you have allergies please be advised of this before you confirm to purchase an item from my store. Thanks! Payment is due within 2 days of confirming payment or a Unpaid Case will be opened. If you notify me prior to the two days that you need a little bit longer, contact me. I am willing to work with you as long as you communicate with me. INTERNATIONAL ORDERS - I use eBay's GSP Program. Buyer is responsible for all shipping costs and fees as shown on invoice from GSP. GSP provides tracking where unfortunately USPS has removed that option. Please do not ask me to ship other than GSP as I will not. Thanks