We are buying DTC3X-FFP1 mask in large quantity. technical specification:  - Masks have got EC type examination certificate against EN 149:2001. - Nose clip shall be plastic. All plastic parts which is used at the mask, shall be antistatic - Masks shall not contain metalic parts of which aluminium, magnesium, and titan content is over 15%. Titan + Magnesisum content shall not be over 6 %. - The material of the mask shall not burn when passing inside the flame with the speed of 6 cm/second. - Filtration performance test shall be made on the masks which is chosen as sample from each deliverance. Filtraton performance shall not below 80% and it must not show difference more than max -2 % over its original value . As to inhalation value must not show difference more than max. +2 % over its original value at the flow rate of 30 lt/min. It must not exceed 60 %. Otherwise the masks shall be rejected.  - Inhalation resistance values shall not exceed following values: At the Inhalation:  0,6 mbar At 30 lt/min flow rate 2,1 mbarat 60 lt/min flow rate At the exhalation: 3 mbar at 160 lt/min flow rate If you the qualified manufacturer, please contact us as soon as possible.