Lucstar A/C Line O-Rings Gaskets Kit – 105 Pieces, 12 Models, Universal Sealing Washer for A/C Systems, Auto & Appliance Use. Color 105PCS Gasket+90 O Ring. TheLucstar A/C Line O-Rings Gaskets Kit includes 105 high-quality sealing washers and O-rings in 12 different models, designed to ensure gas-tight connections between air conditioning components.