Go ahead order your OSHA Sign Today!•EXTREMELY DURABLE: All our OSHA safety products are made from commercial grade materials specifically rated for outdoor or indoor usage for years of maintenance free life in the harshest environments. OSHA Danger Sign, Stay Away When Machine, 18in X 12in Aluminum Choose from: Aluminum, Rigid Plastic Signs or Adhesive Labels. Our signs are extremely durable yet flexible for even the most intense indoor or outdoor conditions.