-A versatile lingual appliance that delivers: -Anchorage. -Arch expansion. -Space and arch maintenance. -Desired molar tip. -Torque. -Rotations. -Lingual arch hold. -This appliance is made out of .036 stainless steel and fits in an .036 x .072 lingual sheath. -Kit Contains : -5/pk of each size. -6 sizes. -30 arches total. **For further product information, please contact Chat Support**