USED ARMSTRONG MACHINE WORKS 812 INVERTED STEAM TRAP B488$130.00 Out of stock SKU: 173903745784 Category: Other Description Additional information Description USED ARMSTRONG MACHINE WORKS 812 INVERTED STEAM TRAP B488B1SH11/BF Additional information Weight 14.00 lbs Country/Region of Manufacture Unknown MPN 812 Brand ARMSTRONG We Buy New and Used Surplus Inventory - Sell to Us