wholesale new national standard disposable thickened kn95 breathing valve of mask anti-industrial dust breathable decoration polishing welding 批发新国标一次性加厚KN95口罩呼吸阀防工业粉尘透气装修打磨电焊

Small business operation, low profit margin, if the sold products have damage, please take photos and contact customer service for after-sales processing. Due to the large number of styles, there may be individual styles out of stock. If there is a stock shortage and we cannot contact the customer, we will send the available stock first, and if there is a stock shortage, we will contact the customer service for a refund. This store does not support any reason for quality problems, sales, etc. to return the goods. Please note that the 7-day reason only applies to individual self-used customers, and wholesale customers do not enjoy the 7-day reason. Thank you for your cooperation. The price of the small store does not include the opening of the bill. If you need to open the bill or custom, please contact the manager's WeChat.