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 1995 Polaris Xplorer 400 4x4 1996 Polaris Xplorer 400L 4x4 1997 Polaris Xplorer 400L 4x4 1998 Polaris Xplorer 400L 4x4 1999 Polaris Xplorer 400 4x4 2000 Polaris Xplorer 400 4x4 2001 Polaris Xplorer 400 4x4 2002 Polaris Xplorer 400 4x4