I recently acquired a crate of M11 gasmask filters. The filters are sealed in their cans. for those not in the know they're 60mm thread, and fit the Finnish M61, US M9, M9A1 and clones and 60mm threaded Canadian gasmasks. I want: $27 shipped per 5. Or $18 per 3 shipped. If anyone’s interested I’ll post photos, and links to my + feedback on other forums.