AROMAHOUSE REFILL PADS ARE DESIGNED FOR SCENTBALL, CARSCENTER, AROMAKEY, AROMAPOD & MIO DIFFUSERS. Add a few drops of any essential oil to the pad, insert into diffuser and enjoy the benefits of Aromatherapy. LONG LASTING PADS: AromaHouse refill offer maximum usage and benefits from any essential oil with all AromaHouse products. Pads should be replaced when they become hard. 20 x UNSCENTED REFILL PADS: WILL NOT ALTER ANY OILS! Allows for maximum flexibility. Can be used with your favorite natural essential oils to derive maximum health benefits from your favorites scents like pure Lavender, Sweet Orange, Tea Tree, Eucalyptus, Lemongrass, Peppermint, Bergamot, Frankincense, Lemon, Rosemary, Cinnamon, and Ylang-Ylang essential oils SAFE and EFFECTIVE: Manufactured in a CE & GMP Certified Facility in Canada. Completely safe and secure around children, pets, and pregnant women. Use it with your favorite diffuser to enjoy the benefits from your favorite essential oils WORRY FREE GUARANTEE: We believe so deeply in our products that we offer a worry free guarantee. If you are not satisfied with our product simply return it. No questions asked Aromahouse refill pads are designed for Scentball, Carscenter, Aromakey and MIO Diffusers. Add a few drops of any essential oil to the pad, insert into diffuser and enjoy the benefits of Aromatherapy. Contains 20 unscented refill pads. Pads should be replaced when they become hard.