Product information "Glomex Rail Swivel Mount RA134"
Glomex yacht pulpit rail swivel antenna mount RA143. Made from anti-yellowing reinforced nylon and suitable for antennas up to 2.4m (8 feet) long. The antenna rail mount works both on vertical and horizontal rails so no matter the angle of your yacht rail or outdoor location there should be a suitable mounting angle. Suitable for rail 22mm (7/8") and 25mm (1"). The thread on the fitting to receive the antenna is 1 and 1/4" and there is a cable exit hole