support for speaker binding post

This is a support for loudspeaker binding post - The support has three holes for 0 - 4ohm - 8ohm outputs wire or 0 - 8ohm -16ohm wire outputs .
The holes are for 4mm Banana Plug Binding Post
Screw Diameter: 4.75mm
Total length: 42mm
The build is intended for rapid prototyping of DIY tube amplifiers.
Made with PLA and 30% infill.
You can check some other ideas about DIY Printed parts for tube audio in my site:
http://agalavotti.altervista.org/