Set of 4. Steel cups with rubber isolators protect your floors from spike damage.

SPIKE SHOES improve the acoustic performance of speakers and components through selective use of either; coupling or isolation, dependent upon the mass load upon their elastomer insert.  Therefore, coupling and isolation, is provided by SPIKE SHOES.  The EPDM insert will not move or shift on its mounting surface, even after being subjected to significant vibration over time.  This ensures components are stationary and secure.