Cadillac Escalade (->2013), Opel Astra, Insignia... speaker adapter (165 mm). 20.540/K

Opel Astra (2010->), Insignia (2009->)..., Chevrolet speaker adapter (165 mm). 
20.540/K, ACV 271230-08

Chevrolet Cobalt (2006-2010) - front and rear doors,
Chevrolet Cruze (2009-2016) - front and rear doors,
Chevrolet Camaro (2010-2015) - doors front,
Chevrolet Malibu (2011-2015) - front and rear doors,

Cadillac Escalade (2007-2013) - front and rear doors,

Hummer H3 (2005-2007) - doors front, 
Hummer H3 (2008-2010) - front and rear doors,

Opel Adam (2013-2019) - doors front,
Opel Astra J (2009-2015) - doors front,
Opel Astra K (2015-2021) - doors front,
Opel Crossland X (2017-2021) - doors front,
Opel Insignia (2008-2021) - doors front,
Opel Karl (2015-2019) - doors front,
Opel Meriva B (2010-2017) - doors front,
Opel Mokka (2012-2020) - doors front,
Opel Zafira Tourer (2011-2019) - doors front...

Technical information:
Panel cut out: 143,50 mm. 
Outer diameter: 164,30 mm. 
Ring height: 28 mm.