With included Gravity System weighs 29g/1oz, it ensures appropriate tension is applied.
By tightening the screws on both sides of the gravity system, you can apply stronger pressure.
A bobbin holder with a characteristic short protrusion design that prevents the ceramic tube from being damaged by strong pressure.

Uses high-quality ceramic (zirconia) tube that prevent threads from breakage.
Gravity system is standard equipment that can increase its own weight and adjust the tension of the thread.
A dedicated bobbin threader is included.