Ive got NTGXTEL17 glass fibre pole and a Bayersan 40ft carbon fibre pole. The problem seems to be the tubing is different (smaller) and it is only sold separately in 25ft lengths. There doesn't seem to be any kind of joiner if I get two lots, if I want to use the 40ft reach pole, which isn't a problem at the moment with the current job, but would be nice to know if I get a higher reach job in the future.