The 303WA-2 has a "U" bolt metal fitting that will require a short stub mast (not supplied). The mast diameter can be 10-50mm (0.4 to 1.9 inches).
The antenna has a total height of 6 feet (1.80m) in three sections. It comes with a preassembled 10 m (30 feet) length of cable with a M (PL259) plug to connect to the antenna base and a BNC plug for your radio receiver.
Click here to view 303WA-2 Japanese/English Instruction Sheet [PDF 381K].