530 Series Rotring compass convex excellent operability, precision resistance and rationality, it is an extension rod built-in compass and medium-sized. You can draw a great circle without having to replenish the bar, you only need to slide the leg. About 480 mm drafting range.

• Throttling medium-sized extension rod built-in compass 5301090 (japan import) by Rotring

Throttling medium-sized extension rod built-in compass 5301090 (japan import) by RotringRotring