This is for the ROD PISTON CAP SEALS ONLY... PLUS A DETAILED SEAL CYLINDER MATCH CHART, TO ENABLE YOU TO IDENTIFY THE CORRECT SEAL TO REPAIR EACH CYLINDER for the rebuild of the hydraulic cylinders that raise, lower, and lock your retractable roof This comprehensive set of 16 U cup seals 14 O-ring Seals is what you need to rebuild all 11 (or 12, depending on year) of your car roof's hydraulic cylinders. Because of changes made by Mercedes during the R129 chassis' run, We have included all the seals needed--regardless of year or model. This is an upgrade to the OEM U Cup Seals, which are not capable of withstanding the aggressive/corrosive hydraulic fluids. The Enhanced Urethane compound used in these seals is exceptionally resistant to petroleum based oils, found in hydraulic fluids used in the Mercedes Benz convertible top hydraulic system. Fits the following vehicles built on the Mercedes SL Class Convertible R129 chassis: 300SL 1989-1993, 300SL-24 1990-1993, 500SL 1990-1993, 600SL 1993-1993, SL280 1993-2000, SL320 1994-2002, SL500 1994-2002, SL600 1994-2002 For repair of Mercedes Benz part numbers: 129 800 0272 / 129 800 02 72 / 1298000272 (Main top drive actuators) 129 800 1672 / 129 800 16 72 / 1298001672 (Windshield top lock actuators) 129 800 2172 / 129 800 21 72 / 1298002172 (Rear top lock actuators) 129 800 2072 / 129 800 20 72 / 1298002072 (Tonneau actuators) 129 800 0072 / 129 800 00 72 / 1298000072 (Rear top lock actuators / tonneau lock actuators on some years) 129 800 1772 / 129 800 17 72 / 1298001772 (Left top-folding actuators) 129 800 1872 / 129 800 18 72 / 1298001872 (Right top-folding actuators) NOTE: THIS IS FOR THE ROD U CUP PISTON CAP SEALS ONLY NO GUIDELINE INCLUDED, BUT DOES INCLUDE A DETAILED SEAL CYLINDER MATCH CHART TO ENABLE YOU TO IDENTIFY THE CORRECT SEAL TO REPAIR EACH CYLINDER Additional Details ------------------------------ Package quantity: 1