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Industry Leading Durability Our Reversible Floor Signs are made from durable polyethylene material. Slippery Hazard / Icy Conditions Sign has an easy grip handle. Reversible Lightweight Floor Signs are 2-sided combining two signs in one, offering versatility. Flip and fold the sign inside-out to display the other message, which is printed on the inverted panels. Lightweight, recycled, corrugated plastic sign is waterproof and affordable. USA’s Oldest Sign Manufacturer Family owned since 1918, we take immense pride in our signage. Being one of the oldest certainly means we know this business in and out. Our South Dakota factory is the oldest manufacturer of metal signs in the USA. We have been an integral part of safety and convenience our signs have provided over the years. Signs Give a Warning – So You Don’t Have To Personally warning people is not always the right solution. Say it with signs! Signs are the safest and the most effective medium to reach out to maximum people on your property.