This is 1 seal kit for the hydraulic cylinders found in many brand 2 post above ground lifts including , Tuxedo , Duro , eagle, auto lift, & other brands with duro power units. This Kit Rebuilds 1 Cylinder This seal kit is for the chainover style cylinder in 7 , 9 , & 11k lb capacity. It works on both base plate and over head models . -HOW TO IDENTIFY YOUR CYLINDER This cylinder has a welded U shaped yoke on the end of it that houses the chain roller. The hose fittings are located at the bottom of the cylinder. At the top of the barrel is a large brass breather port (usually where the cylinder leaks when the seals go bad). See pics to verify your cylinder has the same appearance / breather port and gland. These cylinders can be painted blue or black. If you have a chainover lift with a duro power unit there's a great chance these are the seals you need to get you back up and running. Once receiving your seal kit we always recomend setting the seals side by side to verify the measurements are the same. This is 1 seal kit for the hydraulic cylinders found in many brand 2 post above ground lifts including , Tuxedo , Duro , eagle, auto lift, & other brands with duro power units. This seal kit is for the chainover style cylinder in 7 , 9 , & 11k lb capacity. It works on both base plate and over head models .