metal binding coil

metal binding coil/meta binding spiral coil/double ring coil item name: binding coil material: iron/metal color: various. red, black, white, etc. can be customerized size: different sizes available according to different needs single ring, double ring for choose metal binding coil/meta binding spiral coil/double ring coil inner diameters vary from 6mm to 51mm  spiral binding coils also available  

metal clip