Derailleur hanger, gear mech hanger, dropout replacement for GT bike models:

GT 3000 1999
GT 4000 1999
GT 5000 1999
GT Aggressor 2008
GT Aggressor 2009-2012
GT Aggressor 1.0-3.0 2001
GT Aggressor Ladies 2008
GT Aggressor V-Brake 2008
GT All Terra 2008
GT Alloy 1999
GT Alloy Frames 1995-1996
GT Alloy Frames 1998
GT GTR 1.0, 2.0, 3.0 2002-2006
GT Hard Tails 2000
GT Laguna 2009-2013
GT Lobo 1998-1999
GT Nomad Series 2002-2006
GT Outpost 2000
GT Outpost 2009-2010
GT Outpost 24 inch Boys & Girls 2008
GT Outpost Ladies 2008
GT Outpost V-Brake 2008
GT Passage 2008
GT Rebound 2000
GT Timberline 2003-2006
GT Timberline LTD 2001
GT Transeo 4 2008
GT Vantara 2008-2009
GT XCE I-Drive 2000 1999
GT XCR-5000 2000
GT Zaskar 1995-1996
GT Zaskar Re-Issue 2008

UNION rear derailleur hanger manufactured by Marwi one of the most know manufacturers in the world:

Material: Cast aluminium.
Bolts included.
Marwi catalog number: GH-144
AKA mech hanger, gear hanger