Polar cap bracket to suit top of 60 mm OD sign post. Polar caps feature a slit to insert the street name blade on top of the post in a T configuration. The polar cap has a bolt that holds the street sign blade in place. Polar caps are a specialised bracket that fits onto a 60mm OD post, enabling display of a single sided sign blade. This 50mm NB galvanized bracket fits both 150 mm and 200 mm long street name sign blades.