A hole in the plaster backing paper allows the press needle to be easily and accurately placed on the plaster.
The ZS-013A was developed to be used with any kind of press needle.

Round shape, 13mm diam.
20 plasters per sheet
Package of 25 sheets (500 plasters).

A hole in the plaster backing paper allows the press needle to be easily and accurately placed on the plaster.
The ZS-002 are intended as replacepments for the MAG-PRESS needle or any kind of small magnet.

Round shape, 19mm diam.
12 plasters per sheet
Package of 10 sheets (120 plasters) or 100 sheets (1,200 plasters).

A hole in the plaster backing paper allows the press needle to be easily and accurately placed on the plaster.
The ZS-001 was developed for use with the 6,000 gauss (Br.) magnetic (MEA) electrodes or rubber GSR electrodes.

Round shape, 30mm diam.
8 plasters per sheet
Package of 10 sheets (80 plasters).