Our Metal Yard Sign 18" x 24" with 6" x 24" Rider is heavy duty and built to last! These double sided metal sign holders are constructed of 3/4" angle iron and are powder coated for years of rust prevention. Use an 18" H x 24" W graphic panel as well as an optional 6"H x 24"W rider for maximum exposure. Can be used with corrugated plastic, .040 aluminum or any rigid material up to 1/4" thick. Available in Black or White.