The falcon eyes l3900ga/b tripod is an extra sturdy tripod with thick tubes and a large spreading stand for extra stability. this allows the tripod to carry heavy equipment. yet the air suspension tripod is easy to fold and carry. the included interchangeable spigot can be inserted into the tripod both at the top and the side. this allows you to attach accessories such as a flash both on the tripod and on the side. Diameter rods: 35.7, 31.6, 28.2 and 25.3 mm. the supplied interchangeable spigot has a 1/4" male thread on one side and a 3/8" male thread on the other side. Maximal load capacity: With just the first section fully extended: 22.5 kg The first and second sections fully extended: 22.5 kg The first, second and third sections fully extended: 20 kg The first, second, third and fourth sections extended: 12.5 kg