PRO-PLUS A is the first extension to add to your 'commercial' pole - adding 11ft 4". It fits between the 4th and 3rd sections of the master pole.
PRO-PLUS B (Middle) is the second extension to add- it will insert into the middle of the PRO, extending its length to 60ft while adding 'core rigidity' !
LENGTH : 6ft 2" compact, PRO-PLUS A adds 11FT 4" extension (one story).
Because they are ultra-high modulus, they also upgrade the CORE RIGIDITY of the PRO.
Fits Reach-iT PRO, PRO-CISION