A 16x16mm black wrought iron baluster with a single adjustable knuckle. It measures 1090mm in height, but can easily be trimmed back to suit any staircase/balustrading application if needed. These balusters are DIY friendly, and are often used in stair renovation and restoration projects. They're a fantastic way to modernise a heritage staircase!
Balusters with knuckles are often used as a feature baluster, the matching plain baluster can be found here.