A/C Line O-Ring Kit (MT2640) by Santech®. Rapid. This kit contains all of the o-rings to seal the A/C connections on a single car. Make your beloved vehicle perform reliably, efficiently, and smoothly again with this top-grade A/C component from Santech. Designed to fit, form, and function just like the OEM, this replacement will bring back the proper operation of your system to maintain the overall dependability and performance of your vehicle without costing a fortune. So, replace your worn-out parts with Santech to get the utmost in quality and value.