This Set of 4 Replacement Vanes for FR4/4A Pump from Coburn Company Inc is essential for maintaining optimal pump performance. Crafted from high-quality materials, these vanes ensure durability and efficiency in operation. Designed specifically for the FR4/4A model, they provide a perfect fit and reliable functionality. These replacement vanes meet industry standards for quality and performance, making them a must-have for anyone looking to extend the life of their pump. Easy to install, they help maintain consistent flow and pressure.