SGE 400/3BB 40mm NATO Tactical Gas Mask, for NBC & Impact Protection Open Box New Med/Large. SGE 400/3BB Tactical Gas Mask/Respirator. Open Box, Light Wear, Fully Functional, Unused. The SGE 400/3 Gas Mask has multi-purpose applications. The following are the characteristics of the SGE 4003. Produced under strict ISO 9002 quality standards for maximum reliability & safety. Chemical & Scratch Resistant Coating. Quick release head harness with six adjustable straps. Controlled air flow prevents fogging of the visor. Extremely durable polycarbonate visor has been tested to resist a one inch steel ball, that was propelled at 335 MPH without cracking or damaging the face shield. The mask was also tested for heat resistance and will not catch fire or melt at 800 Degrees C (1472 F) for 5 Sec. Or 200 degrees C (372 F) for a duration of 6 Min. Tecnopro full face masks meet the requirements of EN 136 and are CE marked Tecnopro full face masks can be used with all standard 40mm NATO threaded filters in compliance with EN 148-1 (DIN 3183) and with powered respirators and airlines. Visor is made of impact resistant Polycarbonate. Inner mask and face seal is made of non. Total weight is 530 grams. Compact large field of vision. 1 x 40MM Filter Port.