This is the aspirator I bought from BioQuip.com. It came with only the section of rubber surgical tubing and was very uncomfortable to use till I fitted it with a length of clear vinyl on the sucking end. The difference in tubing types is a handy way not to confuse hose ends and suck up a mouthful of bugs out of the attached vial. Any beetle small enought to fit through the hose was a prime candidate for this collection technique.

I must say that tiny beetles were so plentiful my sucking muscles got a good workout with this device.