Manufactured in the Czech Republic these pins are the most commonly used design for entomology. Our premium quality pins are manufactured from galvanized steel with 2 layers of black enamel to protect against corrosion, and have gold nylon heads for a professional look. Variety Pack includes sizes 000, 00, 0,1, 2, 3, and 4. The lower the number, the finer the pin for smaller insects. The higher the number, the sturdier the pin for larger insects. Packed by size in plastic screw-top vials containing 50 pins each. The convenient 2ml plastic, reusable, storage vials neatly contain you pins at the work bench or in your field pack, and can also be used to collect specimens of small insects, water, soil, sand, and more.