Item was purchased from Amazon originally, never opened from plastic wrap packaging.

https://a.co/d/9C5HwWY

• It is made from traffic grade aluminum and 3M's Diamond Grade Sheeting. 
• GAUGE OF ALUMINUM (thickness): 0.080. 
• ALODIZED ALUMINUM: Sign is Manufactured on D.O.T. Alodined Aluminum. 
• SIZE: 30"