This new or-ring is used on the rear axle assembly of Polaris straight axle ATV's and also as the sealing o-ring of the oil dipstick on many Sportsman models. Sold PAIR. Exact replacement to Polaris part number 5410889. This o-ring is used on the following models: 1998-99 Big Boss 6x6 1999-01 Diesel 1995-98 Magnum 425 1997-09 Scrambler 500 1998-02 Scrambler 400 1999 Sport 400 1999-00 Sportsman 335 2001-02 Sportsman 400 1996-02 Sportsman 500 2000-08 Sportsman 500 6x6 1999-06 Trailblazer 250 2008 Trailblazer 330 2003 Trailblazer 400 2000-02 Trailboss 325 2003-09 Trailboss 330