The Sanus steel Series SF22 is a 22-inch stand for medium-to-large bookshelf speakers up to 35 lbs. Its extra-large steel base includes optional carpet spikes For superior stability on any surface. Twin heavy-gauge steel pillars feature a concealed wire path and resonance damping rings that can be filled with sand or shot for added mass. The 8- by 8.5-Inch top plate offers brass studs and neoprene pads for speaker isolation. This product is sold as a pair.