Road Closed Sign Material:Engineer Grade Prismatic 10+ They make a great gift

They make a great gift and are a huge hit

But no matter what state you live

but not when it comes to MUTCD approved speed limit signs

There are federal standards for minimum reflectivity on all speed limit signs

you can be proud to know that you are buying American when you buy any one of our traffic and street signs

Road Closed Sign Material:Engineer Grade Prismatic 10+ They make a great giftSize: 48x30 We make all our signs from . 080 thick aluminum. Other companies use steel which rusts, plastic which cracks or warps, or a thinner gauge aluminum (. 060 or . 040) which bends or buckles. Material Details We use 3M reflective sheeting and 3M UV resistant inks. 3M offers the following on their sheeting: 3M 3400 Series Engineer Grade Prismatic (EGP): Rated for 5 7 year outdoor lifespan 3M 3930 Series High Intensity Prismatic (HIP):