Safco Products Write Way Rectangle Message Sign 4117BL, Black, Magnetic Dual-Sided Dry Erase Board, Indoor and Outdoor Use HIGH VISIBILITY. Write Way Rectangle Message Sign features a dual-sided dry erase board to post notices, agendas, rosters, events or meeting-room assignments quickly and easily. Just write your note or hang a memo on the white magnetic surface to draw attention to your message. ENHANCED STABILITY. Fill the 18" diameter base with water or sand for additional stability when used in crowded or outdoor conditions. DUAL-SIDED. The magnetic dry-erase board has two sides giving you twice the space to get your messages noticed. INDOOR/OUTDOOR USE. The molded black frame contains UV inhibitors to resist fading from the sun for long-lasting use both indoors and out. PRODUCT DIMENSIONS: Product dimensions: 18"W x 18"D x 65"H. Writing Surface Dimension: 17 1/2" W x 5 3/4" H.