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. ARCHWIRE IDENTIFICATION: - 3 lines for upper - 1 line for lower - Material: Stainless steel archwire with silver soldered brass post - Post size: 0.30” - Upper archwire sizes: 34 to 44 mm (2 mm increments) - Lower archwire sizes: 22 to 32 mm (2 mm increments) - Most common sizes: 36 mm (upper), 28 mm (lower) - Shape: Natural - Archwire identification: 3 lines for upper, 1 line for lower