Equation25 spikes

I own a pair of Equasion25 speakers that didn’t come with spikes despite there being threaded holes for them -three for each speaker. If they did come with spikes, does anyone know what the original spikes looked like, and what size they were? This link to UHF magazine shows a picture of the above speakers: http://www.uhfmag.com/Issue70/UHF70.pdf

Thank you,
Spats