The rear back cover is removed from original Lenovo Idea Centre A540-24API 23.8" All-in-one desktop. The rear back cover is original preowned, and its surface wears cosmetic of signs, scratches and scuffs, but the rear back cover is fully functional and working good condition. No Other Components. The Rear Back Cover Only. Please see actually pictures for more details. 

Rear Back Cover PN: SM10T00313; Model: 23.8-3BSP