The 3.375 x 4 x 0.5 NBR Loaded Symmetrical U-Cup from Freudenberg-NOK is designed for optimal sealing performance in various applications. Made from high-quality NBR (Nitrile Butadiene Rubber), this U-Cup offers excellent resistance to oils and fuels, making it ideal for hydraulic and pneumatic systems. With a size of 3.375 inches in diameter and a 0.5-inch width, it fits standard industry specifications. This product is engineered to meet stringent ISO standards, ensuring reliability and durability in demanding environments.