Up for sale is a Honeywell Survivair SCBA Gas Mask Respirator 20/20 Mask LOT QTY: 137. Most sizes are mediums. What you see is what you will receive. Please inspect pictures closely. If you have any questions, please let me know. Thank you for looking. If commercial what is the business name? In case driver has problems finding your location. If there is a loading dock or forklift available for unloading.