Pair of fullrange speaker MarkAudio MAOP 5 (WHITE), 4 ohm, 100 mm
4" Twin Cone 40W watt Car Van Truck Audio Speakers Pair 100mm | eBay
Tebru 2PCS 100mm Opening Speaker Inverter Tube with Rodent-Resistant Net for 8-12 Inch Speakers,Speaker Inverter Tube,Speaker Accessories - Walmart.com