general3 10/20/50 PCS Outdoor Anti-dust Face Mouth Filter Air Breathing Valves Replacements Activated carbon PM2.5 filters Active Carbon Filters for Mesh or Neoprene Mask -10 pcs-

??? Feature:???  ???    Made of ABS material, durable to use.  ???   Mask accessories, which should be used with mouth masks (not included).  ???     Suitable for sports masks, running masks, active carbon masks, etc..  ???     Item Name: Mask Valves     Material: ABS ???     Features: Replacement, Anti Haze, Mask Accessories     Outer Size: 40mm x 35mm/1.57" x 1.38" (Approx.)     Inner Diameter: 18mm/0.71" (Approx.)     Due to the light and screen setting difference, the item's color may be slightly different from the pictures.     Please allow slight dimension difference due to different manual measurement. ??? Package Content:???   10/20/50  pc Outdoor Anti-dust Face Mouth Filter Air Breathing Valves Replacements