G-STRUT 4 Hole Post Base is designed for use with 1-5/8" strut channels, featuring a side orientation for easy installation. Made of electro-galvanized steel with a zinc coating finish, this post base channel is durable and corrosion-resistant. The 6" square design ensures a secure fit, while the 1/4" thickness provides stability for your structural needs. Perfect for home improvement and building projects, this post base channel is a reliable and high-quality component for your construction needs. Seismic, Rooftop, etc. Lot of 8.