UHS seal and UNS seal are made of polyurethane (PU). Their design cross-section is a Y-shaped lip seal with the same height as the inner and outer sealing lips. They are the main seals for pistons and rods.UHS seal is made of high-quality polyurethane material.It has a wide range of size options, good sealing performance, easy installation, excellent toughness and durability, and intense pressure resistance due to its high hardness. UHS seal and UNS seal widely used and suitable for use under harsh working conditions.