These are a set of three “footers” that are made of top-grade 7075 aircraft aluminum. When used under components or Symposium’s Svelte shelves, they help in vibration control and damping to reduce or eliminate minute unwanted “energy” from the component that is sitting above it. Each coupler has a threaded 1/4-20 hole that could be be screwed under a component or just on its own. Each Coupler is 0.8125 inches high (13/16″ or 2.06 cm) and 1.875″ (4.76 cm) in diameter.
Cosmetically, there are minor scuff marks/light scratches from being used as DEMOs but nothing major. They will be securely packed for safe shipping.