Measures internal and external bottleneck diameters and is available in two different models, the PerfiLab Portable-i for internal measuring and PerfiLab Portable-e for external measuring. To facilitate transport, the size in height can be reduced to about half. Optionally it can be provided with an aluminium transport case. It was developed to meet the needs of both technical and sales staff of cork enterprises and wineries providing bottleneck control can also as laboratory equipment. To control the measuring depth, PerfiLab has a ruler which allows the user the possibility to check and adjust the depth during the test. The diameters are measured by Kroeplin digital gauges (F310 and B440), with great accuracy and digital displays. Besides reading the values from the digital gauge display, the user has the option to connect it to a PC and import the values into a windows software application.