product features:1. Main features-stylish design, light weight, sterile, using environmentally friendly PP flexible materials, which can be autoclaved, easy to clean, unlimited reuse, non-allergic, perfect fit to your head, maximum comfort, Wrap-around design, adjustable belt, tasteless, long service life, etc.2. Extensive compatibility-Our universal replacement helmets are compatible with various masks or face shields of the two-point connection type.3. Washable and durable-The headband is made of durable PP flexible material, which can be repeatedly washed without bending, abrasion, curling, peeling or other types of degradation.4. Functional design: The product is designed with a semi-circular arc at the hook, which is most convenient for wearing around the arc design. It can form a smooth inner surface and is unlikely to cause irritation or abrasion to the skin. The three round holes in the middle can be used as hanging holes, and they can be hung on walls, wardrobes and other places with hooks, which are clean and tidy.5. Instructions for use: Hang the mask lanyard on any hook of the mask partner, and adjust the tightness freely according to the size of the head.This mask hook can be used for long-term work, and its adjustable four-position tightness makes you comfortable during work. with this mask companion, you will truly make the mask comfortable for a long time and isolate the virus and harmful dust substances.colour:blacksize:ABSMaterial:145mmx22mmx1.25mmPackage Contents:10 x Hook upOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.