1989 1990 1991 1992 1993 For POLARIS 250 Trail Boss 4x4 520-64L, 520-70L, 520-88L Non O Ring Chain, 2-11T, 12T, 2-22T, 42T Steel Sprockets Tensile strength of 7600 lbs Includes: New masterlink , only a number of items available. All items are new and usable condition, but the packaging may be ripped off, or it is a brand the distributor 1989 - 1993 For POLARIS 250 Trail Boss 4x4 Non O Ring Chains & Complete Sprocket Set 113.82 520-64L, 520-70L, 520-88L Non O Ring Chain, 2-11T, 12T, 2-22T, 42T Steel Sprockets