This is a new Martin Archery 6X draw length module set for Martin bows equipped with Z CAMS, MINI Z CAMS, ULTRA SONIC or CLASSIC WHEEL CAMS. These are the GFN composite (plastic) modules. Martin bows that were equipped with these cams include the GAZELLE, PRIDE, BENGAL, PROWLER, FIRECAT, CHEETAH, SCEPTER, JAGUAR, PANTERA, OCELOT and RAGE. Actual draw length provided by this set ultimately depends on bow model, string and cable lengths, etc. This set is new or swapped from a new bow at purchase.