Feature Versatile: These white paper test strips are ideal for testing fragrance oils, perfumes, essential oils, etc. They help to quickly classify liquids and can also be used to determine if someone has lost their sense of smell. Easy to use: just dip the narrow end of the test strip into the essential oil (or 2-3 drops) and wait a few seconds, then place it 3-5 cali from the nose and write down on which oil the wide end of the strip is. Size Adjustment: These sharp perfume testing papers measure 0,3 x 5,1 inches, are small and portable, lightweight and compact for your convenience whenever and wherever you need them. Design: These disposable perfume test strips are made of paper, thick, safe and reliable to use, you will feel very comfortable when you use the test paper. Specification: Item Type: Perfume Test Strips Material: paper Single sheet size: approx. 0,8 x 13 cm / 0,3 x 5,1 inches List of packages: 400 x test scented papers (100 sheets per book)