Dental Orthodontic 1st Molar Bands Prewelded Buccal Tube Roth.022 U1/L1 29#-44+#
40#, 40+#. Form a ring with computer simulation design, teeth close fit, moderate hardness, laser marking, permanent marking clear;. 30#, 30+#. surface texturing process used in the ring, improve the bond strength by 30%.