plastic Material: -, acid and , long service life Large Inlet and Exhaust Port Size, High Flow Rate: The valve body adopts the gas dynamics of the DC channel design Dual-exhaust Port Design: power fast exhaust port and micro-automatic exhaust port, which can continuously exhaust the gas generated in the pipeline Power Low-pressure Sealing - can maintain good sealing at low pressure (0.3bar) to avoid leakage phenomenon. Application: System Piping - Prevents air from accumulating at high points of the pipeline, slope inflection points, road and river crossings, eliminating negative pressure. Water supply system-Prevent air from accumulating and negative pressure. Industrial system pipe network and residential area pipe network - to prevent air accumulation Color: As Shown Material: plastic Package Contents: 1 x air release valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.