diff --git a/README.md b/README.md
index bfed811..3d96105 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,7 @@ Parts for modifying and adapting masks and helmets for use with the PAPR
 | mask5   | 1 | Custom 3D print | Bayonet Inlet Adapter | $2 (material) | [3D][3d7] | Inlet Adapter for Bayonet-type masks |
 | mask6   | 1 | Custom 3D print | 6100/6200/6300 Outlet Plug | $1 (material) | [3D][3d8] | Plug for sealing the outlet valve of 6100/6200/6300 masks |
 | mask7   | 1 | 3M | Inlet Filter Gasket  | $2.01 | [G][1grgr] | Inlet Gasket used as part of above outlet sealing |
+| mask8   | 1 | Custom 3D print | MGHT Outlet Adapter  | $1 (material) | [3D][3d9] | Male Garden Hose Thread Adapter for Allegro Helmet |
 
 *note, without modification, these masks do not filter the exhaled air.  They are useful for keeping the wearer safe, but not for keeping others safe from the wearer.
 
@@ -121,6 +122,7 @@ Some of these can be modified enable full 2-way filtering.  Instructions are pla
 [1grgr]: https://www.grainger.com/product/3M-Inhalation-Port-Gasket-3PRG7
 [3d7]: https://github.com/RespiraWorks/PAPR/blob/master/release-candidates/PAPRmasks/PAPRmasks-BayonetInletAdapter-V1.stl
 [3d8]: https://github.com/RespiraWorks/PAPR/blob/master/release-candidates/PAPRmasks/PAPRmasks-6200-OutletPlug-V1.stl
+[3d9]: https://github.com/RespiraWorks/PAPR/blob/master/sandbox/PAPR-OutletAdapter-V9-with_MGHT%20(1).STL
 
 ## PAPR Assembly Instructions
 
diff --git a/sandbox/PAPR-OutletAdapter-V9-with_MGHT (1).STL b/sandbox/PAPR-OutletAdapter-V9-with_MGHT (1).STL
new file mode 100644
index 0000000..49ff6f7
Binary files /dev/null and b/sandbox/PAPR-OutletAdapter-V9-with_MGHT (1).STL differ