This is a 4 input shorting PCB terminal used for zero adjustment of digital multimeter during calibration / adjustment or for noise measurement. 

You can buy it in EUR from the following listing : https://www.ebay.de/itm/225875897176

Functionality description: the PCB shorts DMM's binding posts.

It is suitable only for top-bench DMM which have :
0.75 inch / 19.05 mm center to center distance between vertical binding posts.
0.875 inch / 22.225 mm center to center distance between horizontal binding posts.

Tested with HP 3455A, HP 3456A and HP 3458a.

The PCB has ENIG (gold) finish. The size is 1.11 inch x 1.28 inch (28.1 mm x 32.6 mm).

Please, check distance between input terminals (both horizontal and vertical) before buying the item!

The package includes:
1 pcs. ENIG PCB 1.6mm  thickness, 1oz copper with short connections between all inputs.

The parcel is registered, with tracking number (check the country exclusion list).

I can not issue an invoice, because I'm individual, not a company.

The selling of this product funds the open source digital multimeter project - opendcm blogspot.