All Products › Canadian Forces C7A Filter Image 1 of 2 Image 2 of 2 Canadian Forces C7A Filter from CA$24.20 sold out Standard issue filter of the Canadian Armed Forces. 40mm Nato thread. Options: Select Options Sealed Out of Package (Capped) Get notified by email when this product is in stock. Sold Out Added! Standard issue filter of the Canadian Armed Forces. 40mm Nato thread. Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More You Might Also Like Canadian Force C4 Gasmasks DEMILLED CONDITION CA$25.00 Police Trade-in MSA Millennium Gasmask w/ Clear Outsert and Sealed NBC Filter CA$310.00 Canadian Forces C4 Gasmask Voice Project Unit (VPU) CA$200.00 Sold out German Army 60mm to 40mm NATO Gasmask Adapter CA$7.50 Canadian Forces C7 Filters (Open / Used) CA$10.00