50pcs/Box Dental Orthodontic Lingual Buttons with Round Hole

1.100% brand new and high quality  
2.made of high quality stainless steel 
3.extra polishing shine
4.special base design of hollow base for   removing spare adhensive. 
5.Bonding strength is stronger;Integrated design, underpinning never part
6.increase the bonding strength obviously. 
7.convenient to use
Packed:
50 pieces Perforated Bondable lingual buttons,
50 pieces per box