Here are 3 Masks that all appear to be in Working Condition The Largest one is Stamped “. Clarke “ this measures 380mm inside Top to Bottom , it is 225 across Left To Right The actual Clear Piece on the Front is 175mm x 115mm The next one is stamped “ Rol-Craft “ this measures 350mm Top to Bottom It is 210mm from Left to Right. The smallest one is stamped “ Honeywell Clearways “ it is 280mm Top to Bottom ,on the inside.and is 180mm Left to Right. I. Have no idea how these actually work, and there are Batteries in the Rob- Craft which will be removed for Delivery. On the same day that payment is made to the Auction House, these will be well wrapped in Bubble Wrap and then Boxed for Delivery