922-9790 Apple Speaker (Left) for iMac 21.5 inch 2011 A1311 – AppleVTech Inc. Published August 9, 2018 at 350 × 350 in 922-9790 Speaker (Left) for iMac 21.5 inch 2011 A1311 MC978LL/A, MC309LL/A, MC812LL/A, BTO/CTO