This is just a single glass. 

If your screen breaks, it cannot be used as 

a replacement screen.

Front Glass Bezel Replacement Screens Panel Cover for iMac 24 Inch A1267 iMac Accessories MB382LL/A
COMPATIBILITY - Front glass cover for iMac 24 inch Glass Panel A1267.
STRONG & SAFE - Reinforced tempered glass instead of inferior glass. Metal tips are made of quality steel with strong tenacity.
SOLID PACKAGING - Packaging enhanced with custom-made EPE foams plus corrugated box. No worry about shipping.

DETAILS:
Front Glass Bezel Replacement Screens  Panel Cover for iMac 24 Inch A1267 iMac Accessories    
Front glass cover only. LCD screen not included.    
Please make sure you order correct model. If you are not sure of compatibility, please contact seller.    
Description:
Screen Size: 24in    
Screen type :screen front glass    
Compatibility : Apple iMac 24" Glass Panel A1225 2008 2009    
100% new and high Quality Screen Front Glass Cover Replacement    
Material: glass    
Package Includes:
1x Front Glass Cover