Adjustable Pressure Plug, (Optional) Accessory for Relay Box

Keeps the pressure inside a relay box constant, while keeping the box waterproof and dustproof. Prevents fluctuations in internal pressure due to a faulty packaging seal and keeps the box from being damaged.
The protective structure grade is IP67, ensuring the box is air-permeable. The interior of the box is both dustproof and waterproof, protecting it from condensation and water infiltration.