Disposable dust-protection half-masks for protection against rigid aerosols of 1,2 and 3d classes, according to the Russian standard
Disposable gas and dust half-masks are divided into categories as follows:
Changeable filters * against aerosols for dust-protection half-masks of large dust capacity in the form of a corrugated truncated cone.
Individual protection facilities of hearing organs — aural inserts made from noise suppressing material.