Look at the inside of your limbs.All of the information should be on a little sticker.Now,that being said you should take it to a bow shop that carries that brand of bow.most shops can get you what you need,but its easyer if thay carrey your brand.Whatever you do,have it set up for YOU!.Ya may have to change out cams,or it may be to much WT.,or not enough.Any pro shop worthy of the name can get you set up and on the way to shooting good groups.pan.