Punched channel with 2″ flanges on either side of the punched bar. The punched bar portions consists of round holes for 1/2″ bolts and square holes for 1/4″ carriage bolt or machine screw. Channels available in either aluminum, hot dipped galvanized steel or stainless steel, in 2″, 4″ and 6″ widths and in 10 ft or 20 ft lengths. Punched channels, when combined with corresponding fittings, create protective instrument support systems for single tube, multi-tube and electronic cable in marine and industrial environments. Manufactured in the USA.