Material:made of quality paper, these disposable perfume test strips are thick, safe and reliable to use,which is durable and environmentally friendly. Usage: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 3-5 inches from the nose and take a short whiff. Easy to Carry:Small size, easy to carry, and can be carried at any time. Multi usage:These test strips have wide range of use; they are suitable for perfume testing, essential oil testing, aromatherapy oil, fragrance etc. Package contents:A set of 200 perfume test papers is enough to meet your needs.