[Vehicle Model Caliper Adaptation]: This GAIASURGE brake caliper is compatible with Toyota Sienna 2004-2006 V6 3.3L, 2007-2010 V6 3.5L; It fits models with 4 Wheel Disc Brakes [GAIASURGE Replace OEM Part Number]: 4772228010, 4775028270, 47750-28270, 47722-28010, 19-B2873, 19B2873, 19-P2873, FRC11565C, 4772128020, 47721-28020, 4773028270, 47730-28270, 19-B2872, 19B2872, 19-P2872, FRC11566C. Position: Rear Driver and Rear Passenger [Specification]: Inlet Port Size: M10 x 1.0; Piston Diameter: 1.685 Inches; Brake Piston Count: 1 Piston; Piston Material: Steel; Bleeder Port Size: M7 x 1.0 [Anti-rust]: The finely galvanized brake caliper surface has excellent anti-rust effects and environmental protection performance. A 150-hour salt spray test showed no rust, ensuring the brake caliper remains clean and durable even in harsh environments. [Buy with Confidence]: 5-Year Warranty Brake calipers are an important part of the vehicle's braking system and are responsible for slowing down the vehicle. When the brake caliper is stuck or damaged, it will cause the vehicle to move to one side and needs to be replaced regularly to ensure safety.