No Skateboarding Allowed 18 x 12 Community Signs - 3M REFLECTIVE SHEETING: 3M Engineer Grade reflective sheeting GAUGE OF ALUMINUM (thickness): 0.063 ALODIZED ALUMINUM: Sign is Manufactured on D.O.T. Alodized Aluminum BEST PERFORMANCE: Our signs last 7-10 years in Florida UV and sunlight, are washable, completely recyclable, environment friendly