This adapter allows 6000 - 7000 series 3M filters to be used with 40mm NATO masks.

This adapter allows Honeywell North N-Series filters to be used with 3M 6000 - 7000 series respirators & masks.

Adapter allows NATO filters to be used on 3M 6000 - 7000 series masks.

This adapter allows common 40mm NATO style filters to be used in GOST 40mm masks.