Replacement filter set for dust masks (2 pieces)

This is a set of 2 replacement filters for the mask below.

Koken Co., Ltd. Replaceable Dust Mask
Sakaii-shiki 7191DK-02 Type
Type: Direct Connection Type ? Half-Face Type
Classification: RL3
Applications
Dioxin Level 1:
Suitable for work within the concentration range of the first control area.
Asbestos Work Level 2-3:
Removal of asbestos-containing insulation materials, fireproof coating materials, heat insulation materials, etc.
Removal of other asbestos-containing building materials (molded boards, etc.)