The U500 NMR Tube Washing Unit quickly and easily cleans, rinses and dries a single 5mm NMR tube in seconds, whether it is 7", 8" or 9" long. The U500 is constructed entirely of borosilicate glass, making it impervious to all common cleaning solvents. It is extremely portable, so it can be positioned at any convenient point of use. It functions well on a low vacuum source such as a water aspirator, as well as house vacuum, usually present on most laboratory benches, or with a small, dedicated vacuum pump situated nearby. For 5mm NMR Tubes.