Double Arrow Horizontal/Straight Route Marker Sign Material:Diamond Grade Base is 8-1/2" tall

Base is 8-1/2" tall

Depending on where you travel in the USA

and disposable

These 15 mph speed limit signs are often used in residential areas

For daytime

Double Arrow Horizontal/Straight Route Marker Sign Material:Diamond Grade Base is 8-1/2" tallSize: 21x15 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):