... resistance and high filtration efficiency adjustable nosepiece and inner foam, providing a custom seal for differe Made with special three-ply non ... .Models available: ZH3001, 3011, 3021, 3031, 3041, 3051, 3121, 3131Inner packing:20pcs/boxBox dimensions: 12 x 12 x 16cm, or 13 ... .5 x 13.5 x 16cmOuter packing:20 boxes/ctnCarton dimensions: 62 x 26 x 34cm, or ...