This is a 9ct Yellow Gold Hollow Square Cut Box Chain.
New.
Hallmarked.
 
Chain Width: 2.1mm
 
Lengths Available:
16 Inch - approx 5g
18 Inch - approx 5.5g
20 Inch - approx 6g
22 Inch - approx 6.5g
24 Inch - approx 7g.