In Class II cases with extraction, it may be useful a stainless steel arch with a 0.30” silver soldered brass post incorporated. The posts are positioned at variable distance: upper archwires in 34 to 44 mm sizes, lower in 22 to 32 mm, 2 mm increments. The most commonly used sizes are 36 mm for the upper arch and 28 mm for the lower.
Available in Natural shape.
3 lines for upper, 1 line for lower