These are replacement Kodiak Stainless Steel backed disc brake pads for 225 size calipers. Kodiak has innovative the trailer disc brake market by integrating stainless steel in more areas than any other Trailer Brake Company. The 225 Brake pad is found on Kodiak 3,500lb - 5,200lb Disc Brake Kits. Replacement is easy and long lasting, and Kodiak has a 6 year warranty on their stainless steel parts, as well as a 6 year warranty against pad separation on their stainless steel backed pads. Keep in mind while replacing these brake pads that using Brake Parts Cleaner Spray Non-Chlorinated is ideal for cleaning up the grease and grime that has accumulated on your trailers caliper.