Our comprehensive replacement kit includes everything you need to replace a damaged LCD display. The model A1418 iMac has an LCD panel with glass cover as a single unit, so whether you have defects in the screen's image or a cracked glass front, this is the part you're looking for. There are two display options for the Late 2015 iMac release and this can only be used to replace a non-Retina display with 1920x1080 resolution.
661-02989 LCD for iMac 21.5-inch Late 2015 A1418 MK442LL/A, MK442LL/A (LM215WF3 SD D4) This is a replacement LCD for the Late 2015 iMac 21.5" non-Retina models.