Bass Drum O’s HW4 White 4″ Bass Drum Port

When it comes to venting and porting, Bass Drum Os gives you plenty of options. Its easy to get creative with Bass Drum Os because there are endless design possibilities. Bass Drum O’s now come in 2, 4, 5 & 6-inch diameters! Each size is available in 8 great colors, including Black, White, Chrome & Brass. Pre-Ported Bass Drum Heads with factory-installed Bass Drum Os in multiple configurations are also available!

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