Orthodontic Stainless Steel Arch Wire (rectangular). Material: Stainless steel. 0.016x0.016 upper, 0.016x0.016 lower. 0.016x0.022 upper, 0.016x0.022 lower. 0.017x0.022 upper, 0.017x0.022 lower. 0.017x0.025 upper, 0.017x0.025 lower.
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