There are different versions of lvds cable for different years and models.Make sure buying a compatible model.
Please check the pictures and description carefully before offerding.

What's included :1 x1 LCD display cable Condition:New Compatible for iMac 21" 21.5" A1311 Mid 2010 For iMac11,2 Mid 2010: MC508LL/A (3.06 GHz Core i3)
For iMac11,2 Mid 2010: MC509LL/A (3.2 GHz Core i3)
For iMac11,2 Mid 2010: MC509LL/A (3.6 GHz Core i5) Identifying Numbers: APN : 922-9497
PPN :593-1280 , 593-1280-A 593--A LVDS Cable included
The LVDS cable connects the LCD screen to the logic board.
If you've removed your LCD panel, you might have damaged this cable in the process!
APN : 922-9497 ,PPN :922-9497
Compatible for iMac 21.5" 21" A1311 2010 series