These essential oil strips are perfect for testing oil scents. You can use them to make your own blends or to get accurate smell of your other oils. Just dip the end of the strip into the essential oil (or put 2-3 drops ) and let it sit for a few seconds. You can then hold the test strip up to your nose and take a sniff. Features -Color: White. -Material: Paper. -Size: 15.00X0.70X0.50 cm/5.89X0.28X0.20 inches. - paper strips: Designed for testing aromatherapy oils, perfumes, essential oils, and more. - quality: paper strips produced by special technology, no deformation, no delamination. -Convenient design: The narrow long rectangle shape design of the paper strips is easy to hold. -Easy to use: Just spray the on the test paper, or use the test paper to dip in aromatherapy and essential oils. -Preservation method: paper strips should be stored in a fireproof, dry, and cool place. Package list: 500 x paper strips