DX ANTNNA Balcony Mounting Bracket (for UHF Flat, BS/CS Antennas) MV30ZM This balcony mounting bracket allows you to install BS/CS antennas up to 50cm in size and UHF flat antennas using the lattice of your balcony railing, pillars, or walls. Projection length: 319mm. Mast diameter: φ38mm. Wind resistance: 50m/s. Made with hot-dip galvanized steel (HDZT49) for excellent corrosion resistance, suitable for salt damage protection. This is an unopened, unused item, but please understand that it is still a used item. Returns are not accepted to prevent product substitution. Thank you for your understanding. Thank you.