Had only a 18 cm length and 5.5 in diameter pump in which my "pride and joy" unfortunately quickly anywhere "triggered" is. This pump, which keeps the vacuum perfectly (even with normal walking), he can finally expand in any direction. The only drawback is perhaps that no special valve head portion is attached to the cylinder, which would make wearing without hose and shear pump possible - but then the Super-part would be more expensive. If it is hard enough, you can walk around with tube and scissors pump.
