The C.E. Smith Slip-On Disc Brake Kit is designed for marine trailers with surge actuators or electric over hydraulic systems and is dacromet-coated for corrosion resistance. This kit is sold as a pair and includes disc brake calipers, brake pads, caliper brackets, slip-on rotors, and guide bolts. Please note a brake flange must be present to install this kit.• 10" brake size• Fits 5 x 4-1/2" bolt pattern• For use with axles rated 3, 500 lbs.• Compatible with 14"-15" wheels with 5 lugs Sold as a pair with disc brake calipers, brake pads, caliper brackets, rotors, & guide bolts 10"" brake fits 5 x 4-1/2"" bolt pattern For use with axles rated 3, 500 lbs. | CE Smith C.E. Smith Slip-On 10" Disc Brake Kit