4020: 产品细节图：[展示一次性医用外科口罩的图片] 产品性能：三层防护，有效过滤细菌和病毒，环氧乙烷灭菌，安全可靠。 用材：优质无纺布和熔喷布。 参数表： 型号：ASL-KZ-BLUE 层数：三层 灭菌方式：环氧乙烷灭菌 颜色：蓝色 包装：50只/盒 型号：ASL-KZ-BLUE 用途：用于医疗、卫生等领域的防护，阻挡飞沫传播。 包装：盒装，方便携带和使用。 使用说明：正确佩戴，确保口罩覆盖口鼻和下巴。 售后服务：如有质量问题，可及时更换。 Product Details Image: [Show the picture of the disposable medical surgical mask] Product Performance: Three-layer protection, effectively filtering bacteria and viruses, sterilized by ethylene oxide, safe and reliable. Materials Used: High-quality non-woven fabric and melt-blown fabric. Parameter Table: Model: ASL-KZ-BLUE Number of Layers: Three Sterilization Method: Ethylene Oxide Sterilization Color: Blue Packaging: 50 pieces/box Model: ASL-KZ-BLUE Usage: Used for protection in the fields of medical care, hygiene, etc., to block the spread of droplets. Packaging: Boxed for easy carrying and use. Instructions for Use: Wear it correctly to ensure that the mask covers the mouth, nose, and chin. After-sales Service: If there is any quality problem, it can be replaced in time. 4021: 与4020类似，包装为2000只/箱。 Similar to 4020, the packaging is 2000 pieces/box.