One (1) Premium Lumbar Support Knob (Black/Ebony Color) Compatible with Chevrolet/GMC/Buick/Oldsmobile/Hummer: 2004-2007 Rainier, 2004-2012 Colorado, 2002-2009 SSR, 2002-2009 Trailblazer, 2004-2012 Canyon, 2002-2009 Envoy, 2006-2010 H3, 2009-2010 H3T, 2002-2009 Bravada Approximately 3-1/8" wide Reference: 89042211 8904-2211 Easy, perfect fit with trouble-free installation Designed for a perfect, specific fit, the Red Hound Auto Lumbar Support Actuator Knob (black/ebony) installs easily and quickly. Compatible with Chevrolet/GMC/Buick/Hummer/Oldsmobile: 2004-2007 Rainier, 2004-2012 Colorado, 2002-2009 SSR, 2002-2009 Trailblazer, 2004-2012 Canyon, 2002-2009 Envoy, 2006-2010 H3, 2009-2010 H3T, 2002-2009 Bravada; Made from tough high impact molded automotive grade black plastic