crack screen question

[anixon92]

have a few hair line cracks on iphone.
question is after much searching . there is the touch panel, and then glass screen.
but my question is on ebay and searching there are just glass lens and others selling touch with glass lens. and then there are sellers selling lcd panel with glass lens.
what is the diffents in the panels.
example
LCD Screen Display + Outer Glass Lens for Apple iPhone - eBay (item 300245213517 end time Jul-27-08 08:01:58 PDT)

New Apple iPhone Outer LCD Screen Lens Glass - eBay (item 300245325039 end time Jul-27-08 16:16:47 PDT)

thanks any help
al