Plastic White Black Respirator Breath Valve for Cup Mask Exhalation

Plastic White Black Respirator Breath Valve for Cup Mask Exhalation. Breathable & Comfortable Design: Easy to breathe, smooth to exhale, and not stuffy for all masks. Universal Compatibility: Applicable to all masks with an opening size of 28.7mm. High-Quality PP Material: Made of durable plastic PP, not easy to age with high pressure resistance. Easy Installation: Integrated upper and lower covers with gasket for simple press-to-fasten installation. Protective Function: Prevents harmful substances from entering while reducing hot and humid gas accumulation. Customizable Colors: Available in White/Black shell colors and Yellow gasket color. Eco-Friendly & Safe: Environmentally friendly, recyclable, and contains no harmful additives. Flexible Customization: Supports full customization, minor customization, and customization from samples or designs.