- The closure is relatively expansive, ie both inside the ring and outside there is a part about. In the ring, so the circle is not completely flawless. The supernatant outside demands that one makes the ring on a smooth, spacious area, because even the smallest curvature in the plate causes an increase in the ring and prevents a proper fit.
To handle Anstonsten really good, especially the positive side that the ring is transparent and can thus keep the proportions the soil and filling at a glance.
