Enamel baked galvanized steel ensures long lasting and rust resistant use. Acrylic panes, polyethylene envelopes and bristol cards are included with orders. Markers are packed 25 to a box, minimum order is one box. Markers are offered in these colors: Gray, Green, or Black. Head measures 7.5” x 5”. 16” tall. Window measures: 2.5” x 4.75”.