BIC America V-1220 12-Inch 430-Watt Down-Firing Powered Subwoofer 192551325180 Material: MetalGlass

Material: MetalGlass

but that's something you're willing to find out of yourself

They are used in wood connections utilizing the square neck under the round head which will sit into the hole to prevent the head from turning

Extra fine point lays down precise

BIC America V-1220 12-Inch 430-Watt Down-Firing Powered Subwoofer 192551325180 Material: MetalGlassDown firing, Long throw Subwoofer With Venturi tuned Port 200w Max, 200w Rms Power Freq Resp: 26hz 180hz Variable Signal to noise Ratio: >80db Adjustable Crossover, Automatic On off Signal Sensing The V1220 offers unsurpassed performance at its price! It incorporates a high current 200W (430W peak) amplifier (designed by BASH Technology) combined with a 12" heavy duty long throw woofer and long life butyl surround. The patented "Venturi" vent