You will receive all the files from the I.M.P. Buildings and I.M.P. Risers sets, including those unlocked as Stretch Goals:
SHG004 IMP Risers (incl. Vehicle Ramps Stretch Goal)
SHG005 IMP Hab Module
SHG006 IMP Supply Depot
SHG007 IMP Administrator's Tower
SHG008 IMP Rooftop Ladders
SHG009 Imperial Cargo
SHG010 Planetary Defense Cannon
SHG011 IMP Elevated Landing Pad