https://www.ebay.com/sch/i.html?_nkw=3M+Speedglas+Supplied+Air+System&_sacat=0&_dmd=2

3M Speedglas Supplied Air System

Regular price
$1,373.00
Sale price
$1,021.00

Supplied Air System, For Use With Mfr. No. 25-0099035SW, 9100-Air, Includes 9100-Air Helmet with Side Windows, 9100X ADF, V-200 Cooling Valve, Carry Bag, Standards TC-19C-482