Lighter than the 17-lb. factory spring for smoother, easier cocking. Available individually in 14 -15-lb. weights, or in a Pak with one of 14, 15 and 16lb weights each, so you can try all three to find the weight that works best in your gun. Mfg: Wolff SPECS: Fits small frame New Vaquero and 50th Anniversary New Blackhawk with XR-3 grip frame.