This ZM9541F is a filter accessory for the ZM9541
Used in conjunction with the ZM9541 unvalved or valved medium-size mask
This is a filter not a mask, excluding the frame
Size: 130mm*115mm

This ZM8210F is a filter accessory for the ZM8210
Used in conjunction with the ZM8210 unvalved or valved large-size mask
This is a filter not a mask, excluding the frame
Size: 145mm*120mm

This ZM7711F is a filter accessory for the ZM7711 mask
Used in conjunction with the ZM7711 unvalved or valved medium-size mask.suitable for older children/adults with small faces.
This is a filter not a mask, excluding the frame
Size: 115mm*115mm