Factory Spec, FS-414SV, Suzuki Ozark 250 Eiger 400 Vinson 500, Yamaha Kodiak 400 4x4 Hunter Front Brakes Severe Duty 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 Made in China