Twin Port CE Mask Assembly Size Small + Carry bag NEW SEALED. New Sealed Avon FM53. Respiratory Protective Equipment (RPE). Functions as both a negative and positive pressure mask. VREU lever for easy switching between negative and positive pressure modes. FM53 with CBRNCF50 filter NIOSH CBRN APR Standard Cap. FM53 with CTCF50 filter NIOSH certified to 42CFR84. FM53 is a component of the ST53 SCBA system, which is certified under 42 CFR 84. Type-examination approval: PPE Regulation 2016/425/EU – Module B: Certificate CE 684837. 1x Brand New Avon FM-53 Twin Port US Military Gas mask size Small. 1x 72601/57 Filter mount plug tool. 1x Black Storage Pouch. Does not include VPU unit. Please look at photos for more description.