Telco Telescopic Mast Upper Magnetic Mount - Heavy duty 5mm thick aluminum construction - Straight Through 3mm Tube - Ideal for all Steel Vehicles and Site Sheds - High quality Australian made product. This telescopic mast magnetic mounts have been specifically designed and manufactured by Telco Antennas at the request of our customers to provide a mast mount that's durable, safe to use and removable. With two 100mm heavy duty magnets on each mount makes for a very firm hold. Each Magnet has a rubber coating to insure the bond does not damage your working surface. With a choice of the lower unit with a base plate and holder welded in and the middle unit which is straight through. Our system is suitable for a wide range of installations ranging from the adventurer, to remote communication vehicles.