Outer cartons size 51 - - 41 cm 29 Polypropylene material, no any toxic chemicals or stimulant. Low breathing resistance with high filtration efficiency. Adjustable contoured aluminum/plastic nose-clip and a so BFE authentication 99. 9 % PFE authentication be 96. 8 % In cases of 18 - - size 9of 10 cm 175 mm - 95 remark 50 boxes,3000 of the box