Fits 7K & 8K Axles Equipped with Kodiak Disc Brakes ( Use with #250 Caliper & Pads) Rotor Diameter: 13" 8-9/16" Lugs on 6-50" Bolt Circle Premium Dacromet Finish for Corrosion Resistance Uses 25580 Inner Bearing & 02475 Outer Bearing (Not Included) Poly Screw-on Cap is Included. Kodiak 7,000-8,000 lb Hydraulic Disc Brake Integrated Rotor only; Fits Both Right hand (passenger's) or Left hand (driver's) side of your trailer. Is vented to improve heat dissipation, Cast Iron Construction provides favorable friction for stopping power The rotor is precisely machined to minimizes runout and warping. Comes with Dacromet plating to resist corrosion Specs and Dimensions : Axle Size : 7,000 or 8,000 lbs Construction: Cast Iron Finish: Dacromet Rotor Size: 13" Diameter Stud Pattern: 8 on 6.5" Stud Size: 9/16" Lubrication style: Oil Bath (uses a included screw on cap) Manufacturer: Kodiak Trailer Brakes Warranty: 3 Year Limited Warranty Kodiak Part Number: R/H-133-8-9-D-S