Oh yeah duh. Sizes would be good...and it is hollow.
OAL is 4.350"
Diameter of the large "ported" section is .980"
The smooth shank of the "tap" end's .786", with an ID of .320, and has an o-ring.
And the end opposite of the "tap" is .705" OD, with an ID of .516
Its ported on 4 sides (20 holes).
My apologies for the sub-par ipad pics