WITH or WITHOUT
A Visible Ring
The COSSTRADESIGN Bi & Di models are designed with a circular band (Ring) or a Diabolo made in various materials.
Currently those Band and Diabolo are in aluminum and can be engraved on request.
The Bi models also exists in a PURE version without a visible ring.
Both versions are available in the following sizes :
Bi 130 (diameter 130 mm), Bi150 (diameter 150 mm) & Bi200 (diameter 200 mm)