Bondable mesh base edgewise brackets are designed for patient comfort and ultimate performance. According to the size and hook, the bondable edgewise brackets can be classfied as following: Packing: 20 pcs/set Bondable mesh base standard edgewise bracket 0.022"/0.018" without hook -------------------------------------------------------------------------------- Bondable mesh base standard edgewise bracket 0.022"/0.018" with hook on 3# -------------------------------------------------------------------------------- Bondable mesh base standard edgewise bracket 0.022"/0.018" with hook on 3#,4#,5# -------------------------------------------------------------------------------- Bondable mesh base Mini edgewise bracket 0.022"/0.018" without hook -------------------------------------------------------------------------------- Bondable mesh base Mini edgewise bracket 0.022"/0.018" with hook on 3# -------------------------------------------------------------------------------- Bondable mesh base Mini edgewise bracket 0.022"/0.018" with hook on 3#,4#,5#