Built-in lead AA rank (sensor tungsten weight). The previous V-shaped lead has been changed to tungsten material, and a new weight shape with an even lower fulcrum has been designed. The position of the sinker ball when it settles in is positioned further down than with conventional floats, which increases the float's sensitivity and makes it better able to convey the conditions below the sea surface than ever before. The lowest fulcrum of Matsuda float is the two-stage pipe (2~3mm). The built-in lead has a low support weight shape and is also compatible with two-stage pipes. This is the lowest support structure of all Matsuda floats. Weight: 6–7.5 g. Height: 31–35 mm. Width: 19–22 mm.