The BVA Hydraulics PUMP PISTON BACK-UP RING/SPACER (Model: 5406CMP) is an essential component for hydraulic pump assemblies. This back-up ring is designed to provide additional support and prevent extrusion of seals under high pressure. Made from durable materials, it ensures long-lasting performance and resistance to wear. Its precise dimensions allow for easy installation and compatibility with various hydraulic systems. This component meets industry standards, making it a reliable choice for maintaining hydraulic pump efficiency and performance.