The Sound Town ST-RR-06U (2-pack) or ST-RR-06UX2 (4-pack) is a 6U rack rails that keep your pro audio gear level and organized. It is made from heavy-duty 3mm cold rolled steel and comes with a black powder coated finish. The rails come with printed numbers that make level installation easy. Better yet, screws are also included in the package. FEATURES Two 6U rack rails included, perfect for your studio or live rack Made from heavy-duty 11 Gauge (3mm thick) cold rolled steel Black powder coated finish Printed numbers and dividers help level installations Screws included in the package 2-pack or 4-pack available SPECIFICATIONS Shipping Weight & Dimensions Shipping Weight (2-pack) 1.2 lbs Shipping Dimensions (2-pack) 2.0 x 1.6 x 11.4 (inches) Shipping Weight (4-pack) 2.4 lbs Shipping Dimensions (4-pack) 11.8 x 2.4 x 3.5(inches)