Silicone Wrap. Air Filter Black Silicone Wrap 5.25" / Height 5" AEM Dryflow Pre-Filters are manufactured from a durable micro-screen material and pretreated with a proprietary hydrophobic process built to prevent splashes of water or mud from saturating your Dryflow air filter. AEM Dryflow Pre-filters also stop small dirt particles; yet add little restriction Made of a durable micro-screen material Protects your Dryflow air filter from water and mud Also blocks small dirt particles Adds very little air restriction *By request/order.