Features: - Metal brackets are tarnish-resistant and manufactured using MIM technology, an efficient, multi-step process capable of producing intricately formed brackets to exact dimensions and tolerances. - The result is an accurate prescription built into each bracket - The bio-compatible, nickel-free material of these brackets ensures that they are both safe and an effective choice for your patient. - Manufactured from high-quality 17-4 Stainless steel, with unsurpassed bracket body strength. - Permanent ID for easy bracket identification. - Integral ball hooks for maximum strength. " Specifications: - Mini. - Slot size: 022. - Bondable. - 3/4/5# Hooks.