The BRAKE DISK, 2.12" OD, 0.215" THICKNESS, 1" ID MINOR, 1.128" ID MAJOR (Part Number: 1818-0004) by INERTIA DYNAMICS is a high-quality brake disk designed for efficient braking control. With its dimensions of 2.12-inch outer diameter, 0.215-inch thickness, 1-inch minor ID, and 1.128-inch major ID, this brake disk ensures precise and reliable braking performance. Its durable construction and easy installation make it suitable for various industrial applications.