Item SJ103225 has must read information.
: Per the vendor the ZB2 & ZA2 line of switches are no longer available. The new line of switches are not a direct replacement for the ZB2/ZA2 line. Please refer to the attached chart to assist in service replacement. 

SJ-NC CONTACT BLOCK

$5.30
:

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SJ103225

:
: 1  : 1  : 0.5  : 0.01

:
EA
:
:
SJ-NC CONTACT BLOCK - SJ103225