Product Details: The Euclid Spicer U Air Brake Minor Brake Repair Kit the perfect solution for trailer axle brake repairs. With a brake diameter of 12.25" and FMSI/Model of Shoe 4536 and 4692U, this kit is designed to fit perfectly and provide improved braking performance. The brake width of 5.50" and 7.5" ensures a perfect fit for your trailer axle. This kit is designed to be easy to install and requires no special tools or equipment, saving you time and effort during maintenance. With this, you can be sure that your trailer axle will have optimal performance and improved braking capabilities. FleetPride is your First Click in Heavy Duty®.