The seal kit for the Generation 1, 10-hole Level Up 14K hydraulic jack with a 2.5-inch bore and approximately 27-inch length, as used on the front passenger side of your 2021 Alliance Paradyme 340RL, is not currently listed in our online catalog. The original part number 25712510 and the equivalent Lippert part number 8005413 appear to be obsolete or unavailable. We recommend considering alternative compatible seal kits or contacting Lippert directly for possible stock or recommendations. If needed, we can assist in identifying compatible parts or provide guidance on repair options for your hydraulic jack. Please let us know how you would like to proceed.