M4 Air supply sealing full mask is made of silica gel complex material, weight light.face part sealed in five points.
It can be used together with PRF102R, PRF-103R or PRF-104H respirator. When using with PRF-103R, the M4 can be used as a normal negative pressure dust and poison proof mask when the main body does not work. It's the best choice for protecting operators from occupational diseases.
Weight only：420g.
