Have the pump get delivered at 9:12:14 and realized that was not delivered the desoldering pump pictured here! The pump has - as seen here in the photo - no aluminum screw cap, but one made of black plastic, as can be seen in some customer images also. The pump is also on another Amazon site with black K. closure - there offered with proper imaging. This device does, in fact, two different versions: the pictured here is the Premium version. To see the same design, but in a slightly different guise eg C ... ad Electr. Where there is also the front part as a substitute. (Plastic version or aluminum depending on the model), the description here is already correct, namely the aluminum version has lt. Of page Wentronic the Modell.- No .: 51204 (LSP 100 Q). Only delivered me was the cheaper model !!! So watch out and googled something! Currently, the part works, but due to the plastic fine threads in combination with the aluminum body is telling when this is vergurgt.