Do not send us an email or note specifying what length chain you need. You must ORDER the correct length. BUYER must check chain length needed before ordering. Any info provided by seller regarding stock length is to the best of our knowledge, but seller is NOT responsible for chain that is ordered incorrectly. Any return for different length chain will be at buyer's expense, including shipping both ways. PLEASE check BEFORE ordering. This brand new o-ring chain sprocket kit fits the following models 1990 Polaris Trail Boss 250 4x4 1991 Polaris Trail Boss 250 4x4 1992 Polaris Trail Boss 250 4x4 1993 Polaris Trail Boss 250 4x4 Included is 1 520 x 88 O-ring chain 1 520 x 70 O-ring chain 1 520 x 64 O-ring chain 3 Master links clip style 1 11 tooth sprocket 1 13 tooth sprocket 1 13 tooth sprocket 2 22 tooth sprockets 1 34 tooth sprocket All chain is tensile strength of 8200 pounds Factory Spec brand Factory Spec brand sprockets are made of hardened steel and built to last O-ring style means it will last longer with less maintenance than conventional chains Stock photo is used you will receive exactly what is described in the listing.