BANNER MATERIAL - Heavy-duty, single side, 13 oz, outside-durable, flexible banner material. Banners are hemmed on 4 sides, with metal grommets every few feet for hanging. We can not do double side at this time; for greater versatility and durability, many people just order two and put back to back. LETTERING - Unlimited colors and many different typestyles. Unlimited words when you submit your own print ready file. 20 WORD limit when we design.