Harman Direct Vent Wall Passthrough and Metal-fab pipe?

[flashbang]

Will the Harman Direct Vent Wall Passthrough thimble # 1-00-677077 work with metal-fab 3 inch pipe?
Metal fab outside dimensions are 3.5 inches but the harman thimble makes no mention of what size the hole is or what pipe to use.
has anyone used this combo?
The pics of the harman thimble are not mine it belongs to Young Mike. I borrowed them to show the thimble/outside air combo.

Thanks

 

[Delta-T]

Yes, Metal-Fab 3" pipe will work with the Harman DV wall Passthrough