Everything is 2" except as noted.
For the DRAIN plumbing...
Two shower drains
Two 90deg elbows (I used the street elbows shown with the intake set)
Two 2-to-3 inch adapters
One 3" cleanout tee
For the INTAKE plumbing...
One tee
Two 90deg elbows
Two Uniseals
Two 90deg elbows (street?)