Unit Valve Indicator Plates - Set of 4

This is the Rotating Double-Sided Indicator (Model Number: 857-36) by UNIT. Key features are as follows:

Purpose: A safety sign to indicate the status of gas cylinders and valves (empty/full, open/closed).

Function: The display can be switched with a single touch while the main unit is attached.

Features: Equipped with an auto-stop mechanism that locks at 180-degree rotation, allowing confirmation from either side.

Specifications: Size is 101x48mm, made of ABS resin.

This was found while organizing my home.
It is unused, but has been in storage, so please refrain from purchasing if you are sensitive about such things.