The McCormick 6722190A1 is a genuine OEM seal kit designed for various McCormick X6 Series tractors, including models from X6.420 to X6.990. This essential kit ensures proper sealing and performance for critical components. It is also compatible with Massey Ferguson 5400 Series tractors, such as 5425, 5435, 5445, 5455, 5460, 5465, 5470, 5475, 5480, 5490, 5495, and 5499. Cross-references to Massey Ferguson OEM part numbers 3540003M90 through 3540003M99 confirm its broad applicability.