Blank block for voice alarm panel VAP-1.

It can be used in two ways:
With VAP-1 in 4U and 6U racks.
Below the ONE-500 unit when it is installed on the wall.
Main Features
Material: iron plate 1,5 mm / 0,15″
Dimensions (W x H x D): 86 x 132 x 42 mm
Net weight: 750 g