that's my experience with this pump ..suite to comments on this pump I decided to buy ... the first pump comes with the needle that is not zero but -1.5 bar (certainly of a very large shock on the pump) ... So it is impossible to make pressure measurements referred to ... pump ... AMAZON second pump comes up with this time with the manometer which is completely twisted and the part connecting the piston manometer is also twisted and leaking !!!! referred to pump AMAZON ..troisième ordered and should be delivered in the mailbox (such as the previous two) on 27-10-14 at 19:30 ... I decided to consult the private parcel delivery website (amazon privileged to carrier France) ..and I see written: "After a delivery attempt (NO), your package will be delivered tomorrow at a point close relay it Please refer to the carrier's tracking site for more information on that relay. . - October 27, 2014 8:06:00 p.m. "WRONG !!! I was present and the mailbox has not changed ..this place just as the driver was finishing traviller to 19h and I have received the message that I 'was absent from my home at 19:14 .. .. the package should be developed next relay or the sle 28.10.14 ..The 28-10-14 anything .... The 29-10-14 package relay relay package anything ..The 30 -10 to 14 I call the customer service .. PACKAGES PRIVATE response from the parcel this morning .... I sui ssur internet all day if the package will arrive or not the package relay ... no news .. .. I spend just in case the relay packages that evening ... the package is still present HOWEVER nya no monitoring on the private parcel site while I sui sen possession of the package ... FURTHER questionable quality of this pump ..pouquoi AMAZON continues to work with sprivé coli despite the very many negative reviews that you can find on the net about this company ... ????? shame because it affects the quality of service amazon !!!