DescriptionMade ofPVCmaterial,they aredurableforlong lasting use.They are used to a djustthe mask lanyard,makes you feel more comfortablewhen wearing masks. E asy to use, bring much convenience to you. Can effectively keep mask in place, you can enjoy your working time.Features-Color: Assorted Color. -Material: PVC. -Size: About 1x0.5x0.5cm/0.39x0.2x0.2 inch. - Made ofPVCmaterial , durable and easily using.- Can keep mask in place effectively, you can enjoy your working time.- Adjustable design makes you feel more comfortable, easy to use, bring much convenience to you.-V ery practical in use, giving you a good using experience.-500pcs for a package, enough for your daily using.