Factory Spec severe duty brake pads are made of a sintered bronze compound. Their exclusive high-density mix extends pad life for use in extreme conditions such as sand, mud, water and farm usage. If long life is your main concern, these brake pads are your best choice. They will last much longer than any semi-metallic or organic brake pad on the market. Manufactured by Factory Spec Included is two sets of brake pads, as pictured This is enough to replace the pads on the front calipers Made in China These sintered metal brake pads fit the following models 1993 Polaris Sportsman 400 4x4 1994 Polaris Sportsman 400 4x4 1995 Polaris Sportsman 400 4x4 1996 Polaris Sportsman 400 4x4 1997 Polaris Sportsman 400L 4x4 2001 Polaris Sportsman 400 4x4 2002 Polaris Sportsman 400 4x4 2003 Polaris Sportsman 400 4x4 2004 Polaris Sportsman 400 4x4 2005 Polaris Sportsman 400 4x4 2008 Polaris Sportsman 400 HO 4x4 2009 Polaris Sportsman 400 HO 4x4 2010 Polaris Sportsman 400 HO 4x4 2011 Polaris Sportsman 400 HO 4x4 2012 Polaris Sportsman 400 HO 4x4 2013 Polaris Sportsman 400 HO 4x4 2014 Polaris Sportsman 400 HO 4x4