The John Deere LVU21420 is a genuine OEM rockshaft piston sealing ring designed to ensure a tight seal within the rockshaft hydraulic system of various John Deere agricultural tractors. This critical component prevents hydraulic fluid leaks and maintains proper rockshaft operation, contributing to the efficient performance of implements. Manufactured to John Deere's specifications, it guarantees durability and precise fitment for compatible models including 5E, 5R, 6M, 6R, and 7R Series tractors. With an inner diameter of 50 mm, an outer diameter of 56 mm, and a thickness of 3 mm, this sealing ring weighs approximately 0.01 kg.