Brand Shengxing Product Name particle filter mask Material 2 layers of non-woven fabric, 2 layers of melt blown fabric, 1 layer of hot air cotton (5 layers) Executive standard GB / T 32610-2016 Packing method 50 pieces / box, 40 boxes / box Color box size 21.5cm * 12cm * 11.5cm Outer box size 61.5cm * 44cm * 47.5cm Gross weight 14kg Net weight 10.6kg Shelf life 2 years Mask size 16cm*10.5cm ±5mm
