The SANUS Steel Series SFC18 is an 18-inch stand for center-channel 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 and can be filled with sand or shot for added mass. The 14 by 8-inch top plate offers adjustable brass studs for center channel speaker alignment. This product is sold individually. Product Features Heavy-gauge steel construction Acoustic properties tested in anechoic chamber Adjustable carpet spikes Isolate vibrations with resonance damping rings Includes brass isolation studs