These essential oil test 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 oil (or put 2-3 drops ) and let it sit for a few seconds. You then hold the strip from the nose and take a short . Features - ColorWhite - Material: Paper. - Size: Approx. 15x3.6x0.3cm. - Each fragrance testing notebook contains 50pcs test paper strips. - The essential oil test strips are unmarked and perfect for testing oil or perfume scents. You can use them to make your own blends or to get accurate scent. - test strips are made of paper with soy ink printed. 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. - The product is a great your family members or friends. Package list: 2 x 50pcs perfume testing strips