VEVOR Coil Spiral Binding Machine, Manual Book Maker 34-Holes Binding 120 Sheets, Punch Binder with Adjustable 3/16" - 9/16" Coil Binding Spines and Side Margin, for Letter Size, A4, A5

What size plastic coil spiral binding is used with STD12A model? Is it 3:1 or 4:1?

Is this a spiral coil binding machine or a metal wire binding machine?

Can it use a 3:1 plastic spiral

What plastic coil spiral is used for the: VEVOR Coil Spiral Binding Machine, Manual Book Maker 34-Holes Binding 120 Sheets, Punch Binder with Adjustable 3/16" - 9/16" Coil Binding Spines and Side Margin, for Letter Size, A4, A5