A fan bought me this balloon pump from my wishlist and asked if I would blow up a few 16" crystals as they were his favorite. He told me that these 16" from mexico got BIG after blowing them up a few times. So thats what I did And he was right! This pump makes quick work out of these suckers but the bad part is that they EXPLODE if I am not careful! One bit the dust on the first inflate and another right in my face!!! I guess I will just have to play with these and the pump a bit more to learn the limits.