Packing instructions: 7503 mask 10pcs (no any filters) 7503 mask 5pcs (no any filters) 7503 mask 1pc (no any filters). Advanced silicone material, comfortable fit, suitable for long time wear 2. Advanced headrest design, adjustable headband for a more comfortable experience, wearable with hard hat 3. Snap-on assembly design, can be used with 2091 particulate filter cotton and 6000 series filter cartridge 4. Wide application and strong applicability 5. Unique exhalation port, downward design, does not affect the line of sight 6. Conditions are rich, use worry-free 7. Products get multiple national certifications 8. We are a factory and support wholesale. If you need long-term cooperation, please contact me directly, I will definitely give you a preferential price. Welcome to Dropshipping order! You just need to note: We don’t include or add any company information or Aliexpress logo on or inside the package. We will deliver the goods according to your requirement. When will we send your order? After receiving your order, we will send your order within 48 hours. How long will it take for me to receive the package? If you are satisfied with our products, please give us all 5 stars. Please inform us immediately and we will provide you with the best service and solution. Please fill in your full name and complete address, including your apartment number, street, city, region and country. When the package comes, please check it face to face and sign for it.