Specification: 10, 10A, 11, 11P, 12, 12B/12D, 14, 15, 15C, 15T, 16, 18, 19, 20, 21, 22, 23, 24, 25. This disposable scalpel is composed of plastic handle and carbon steel / stainless steel blade in various specifications. They are packed in individual vacuum aluminum foil bag, sterilized by Gamma radiation.