According to the size and hook, the bondable roth brackets can be classfied as following: Bondable mesh base standard roth bracket 0.022"/0.018" without hook , Bondable mesh base standard roth bracket 0.022"/0.018" with hook on 3# , Bondable mesh base standard roth bracket 0.022"/0.018" with hook on 3#, 4#, 5# , Bondable mesh base mini roth bracket 0.022"/0.018" without hook , Bondable mesh base mini roth bracket 0.022"/0.018" with hook on 3# , Bondable mesh base mini roth bracket 0.022"/0.018" with hook on 3#, 4#, 5# 20pcs/set
