Speaker Spikes, 4 Pcs/Pack Pure Copper Speaker Spike Feet Pads Isolation Spikes Stand Shoes Shockproof with 4 Base Pads for HiFi Speakers or Speaker Frame : Amazon.ca: Electronics
BRASS M8 Solid Speaker Spikes + BRASS 16mm Spikes Shoes - Set of 4 : Amazon.co.uk: Electronics & Photo
Spike Your Speakers : 4 Steps - Instructables
4 x Speaker spikes and feet M8 thread 42mm black plated finish | eBay