Features:

Can only be used with 501 filter retainer and 6200/7502/6800 Series mask.
It can filter all kinds of non-oily particles, but it is not suitable for filtering radiation and high-toxic particles.
Made of microfiber, effectively keeping you away from dust and particulates.
Effective, giving you a better working environment.
Helps provide respiratory protection.

package：

10，20，40，60，80，100pcs Filter cotton

Note： gas mask not included