Features: 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. Description: Color: Shown in the pictures. Material: Paper. Size: Approx. 115*15mm / 4.5* 0.59 inch (L*W). Made with imported paper with soy ink printed. Environmentally friendly and safe to use. Great absorption capacity of water and oil. Easy and convenient to test. Designed to test aromatherapy oil, perfume, essential oil and so on. Package include: 100pcs *Essential Oils Test Tester Paper Strips Note: 1. Manual measurement tolerance is 2-5g/cm. Please don't mind your proposal. 2. Due to differences in display methods, the image may not reflect the actual color of the item. thank you very much