Make Your Own Personalized Custom Single Sided Street Name Sign - Made to Look Like The Real Thing! - 3M's Engineer Grade Sheeting. Traffic Quality .063 Aluminum Rounded Corners (Blue) STREET NAME PLATE: This street name plate is single sided and has two holes for mounting. REFLECTIVE SHEETING: 3M Engineer Grade reflective sheeting GAUGE OF ALUMINUM (thickness): 0.063 ALUMINUM: Treated for outdoor use to prevent rust BEST PERFORMANCE: Our signs last 5-7 years in Florida UV and sunlight, are washable, completely recyclable, environment friendly