Yes, i agree that you gotta watch out for cheap wimpy FLAPS hoses.  But if
you hit a few shops you may be able to find a stiffer hose that will
suffice for the vacuums that these things pull.

Now the big hoses (about 5/8") i use, uhm, heavy wall Tygon that was
donated by the NSF and some, uhm, thick walled vacuum tube that again was
donated by NSF.... perks of the job i guess.  I had a hard time finding
that size at the flaps and just resorted to the box of hoses in lab.

back to CARS. (Coherent Antistokes Raman Spectroscopy)
-m

Matthew Pollard          "Racing with the wind and flirting with death
Dept. Of Chemistry        So have a cup of coffee and catch your breath"
University of Idaho
www.uidaho.edu/~poll7356