This comprehensive brake wheel cylinder set includes four rear cylinders designed specifically for ISUZU NQR, NRR, NPR, and NPR-HD models from 2003 to 2021. Each 1-5/16" cylinder is precision-engineered to deliver reliable braking performance and includes both right and left side components for complete rear brake system coverage. These wheel cylinders feature durable metal construction with protective rubber boots and return springs for consistent operation. The set comes complete with bleeder screws for easy installation and brake system maintenance. Each cylinder is individually packaged in protective boxes to ensure they arrive in perfect condition. These cylinders offer a direct replacement solution for your vehicle's braking system. Backed by a 1-year manufacturer warranty, giving you confidence in your purchase for this critical safety component.