This letter set lot includes: 1.5mm Sans Serif uppercase letters with an ampersand (&). 1.5mm Sans Serif lowercase letters with a question mark (?). Made of tool hardened steel. Rated for use on soft metals like silver, nickel, aluminum, alkeme, pewter, copper and brass ⚠️Most likely coated with a light coat of oil to prevent rusting. Wipe this off with a dry paper towel. Do not use water. 📨Ships in a USPS padded flat rate envelope. 2 lbs 5 oz