iMac 21.5″ A1311 – Hinge Clutch Mechanism $10.00 A1311 – Late 2009 – Mid 2010 – Mid 2011 iMac 21.5" A1311 - Hinge Clutch Mechanism quantity Add to cart Add to Quote Continue Shopping Category: A1311 (21.5" iMac) Late 2009-Late 2011 Description Hinge or Mechanism for the iMac A1311. Late 2009 – Mid 2010 – Mid 2011 – Mechanism – 922-9133