DS18 HYDRO CS-12 12″ Silicone Cover for All Towers, Speakers and Subwoofers Silicone marine covers – DS18 has a new way to protect your expensive sound system investment during the time you are not using it. We now have silicone molded speaker covers that protect the entire face of your DS18 tower, speaker and subwoofers when in storage or not in use. Highlights Protect your investment with Silicone Marine Speaker Covers! These speaker covers are designed to shield the entire face of 6.5-inch marine tower speakers and protect them while they’re not in use