The 2118707-2 from TE Connectivity AMP Connectors is a vented, 1-piece RF shield cover measuring 0.650" (16.50 mm) x 0.650" (16.50 mm), designed for surface mounting.
The 2118707-4 from TE Connectivity AMP Connectors is a 1-piece, vented RF shield cover measuring 0.650" x 0.650" (16.50 mm x 16.50 mm) for surface mounting.