Brand new, never used.  Only removed from original protective wrap for photo.

Dell OptiPlex Small Form Factor Dust Filter Kit, F8FVV, 750-ABFY.

Dust filter fits over the front of the chassis and safeguards internal components in areas such as factory, warehouse, and retail environments without impeding air flow.

Compatible with 3040 SFF, 3050 SFF, 3060 SFF, 5040 SFF, 5050 SFF, 5055 SFF, 5060 SFF, 7040 SFF, 7050 SFF, 7060 SFF, and XE3 SFF