Manufactured in Czech Republic, handmade product. Black enameled pins are made of spring steel with nylon heads, and two coats of black enamel for anti-rust protection. Pin sizes 1,2,3, and 4 are for most insects, sizes 5,6, and 7 are for heavy - bodied ones; and 000,00, and 0 are for small ones. Packaged and sold in lots of 100 or 1000 pieces of one size. Price is for 100 pieces.