Czech full face gas mask / respirator in good surplus condition. Includes AVEC NBC-3/SL filter. This mask uses standard 40mm NATO (RD40) thread, making it compatible with a wide range of filters. Marked EN 136:1998. 40mm NATO / RD40 connection. Includes AVEC NBC filter. No cracks, visor remains clear. Straps and seals in good shape. Filter condition unknown – no guarantee of protection performance. Please check all photos carefully.