The PLUS B fits in between the 4th and 5th section of the Reach-iT MINI.
PLUS B (compact height 4ft 6") is an 8ft 4" extension which, along with PLUS A, extends the MINI to 45FT, or 55ft reach!
PLUS B is a Core Rigidity Extension. The taller the pole is, the more stress gets applied to the middle sections of the pole. Adding a high modulus extension increases the rigidity at the core while extending the reach of the pole.
With the CONNECT AB, you can turn PLUS B (and other PLUS extensions) into a second 25ft modular water fed pole.