Blackbird S.R.P. Floats are designed primarily for less turbulent flows. As with smooth, flat or semi still waters.
Product Dimensions
SRP-2: Diameter - 0.500'', Length - 4.25''
SRP-3: Diameter - 0.450'', Length - 4.75''
SRP-4: Diameter - 0.450'', Length - 5.20''