4" Letter on 4 7/8" Clear Panel Four different fonts that are interchangeable with Wagner Zip Change Letters Durable Rigid Letters for Push Up-Drop Down Tracking This plastic, changeable sign letter is designed to be used with acrylic tracking and a letter changer pole Freeze Resistant – Small feet at the bottom of each letter help keep it from freezing to the sign tracking 4" Gemini Pronto Modern 250 Piece Full Set Black Letters/Black Numbers