These essential oil test strips are perfect for testing oil scents. You can use them to make your own blends or to get a more accurate smell of your other oils. Just dip the end of the strip into the oil (or put 2-3 drops on it) and let it sit for a few seconds. You then hold the strip from the nose and take a short whiff. Features -Color: White. -Material: Paper. -Size: Approx. 11.50X1.50X0.10cm/4.52X0.59X0.04in. -Superior quality: Tester paper strips produced by special technology, no deformation, no delamination. -Tester paper strips: Designed for testing aromatherapy oils, perfumes, essential oils and more. -Convenient design: The round shape design at one end of the Tester Paper Strips is easy to hold. -Easy to use: Just spray the perfume on the test paper, or use the test paper to dip in aromatherapy and essential oils. -Preservation method: Tester paper strips should be stored in a fireproof, dry and cool place. Packing list: 200 x Tester paper strips