The Opatra Opulence Refill Oil Cartridges provide hair with the care it deserves. The refillable cartridges contain a proprietary blend of hair nurturing ingredients, which are transformed into small molecular particles and mystified upon insertion into the brush. This allows the oils to penetrate every hair strand in just five seconds, ensuring hair receives the full spectrum of nutrients for enhanced strength, shine, and overall health. Give your hair the optimal nourishment it deserves with this incredible hair care experience.