Railroad Crossing Crossbuck Sign - 30 x 6 Novelty Road Sign. A Real Sign. 10 Year 3M Warranty ALODIZED ALUMINUM: Sign is Manufactured on D.O.T. Alodized Aluminum GAUGE OF ALUMINUM (thickness): 0.063 REFLECTIVE SHEETING: 3M Engineer Grade reflective sheeting BEST PERFORMANCE: Our signs last 7-10 years in Florida UV and sunlight, are washable, completely recyclable, environment friendly No Holes