Our technology permits close tuning tolerances while reducing friction and heat for the utmost endurance. OEM TECHNOLOGY Low Friction Seal:: SACHS advanced seal technology uses a special NBR rubber which is highly wear resistant and can withstand temperatures to 260 degrees F, keeping oil in and contaminants out.
Made the car ride like new again without any harshness. My only complaint is that the airline fittings had to be modified to install them, but it really isn't a big deal, and I'm certain I saved lots of money compared to purchasing the OEM AC Delco units for my 2000 Buick Ultra.