Brand: Zoom Two sides braking force Ball bearing actuation system Two sides adjusted the pad gap Caliper: Two sides braking force Ball bearing actuation system Both 51mm IS&74mm Post mounting Diameter: 160MM Material : SUS410 Stainsless steel Weight : 228g/pc Suit for: A or B pilar Package: 1pc front brake / Rear Brake or 1 Set Front and Rear brakes