This can be used with both vertical and horizontal air vents. Each car air vent clip comes with a premium quality, reusable felt pad for you to add a few drops of your favorite essential oil to enjoy while you’re driving! Add more oils as the scent fades. >> D I M E N S I O N S << approximately 2in x 2in >> I M P O R T A N T N O T E S << All designs are handcrafted and one of a kind. Each rattan piece is unique and ranges slightly in size. Rattan color shades may vary slightly as each piece is unique + beautiful and one of a kind. Please allow for minor variations in appearance as each piece is made-to-order!