For Jbl Xtreme Series 4.5 Inch Special Bass Passive Radiator Assistant Woofer Radiation Metal Diaphragm For 3-5inch Speakers Use - Speaker Accessories - AliExpress
4.5 Inch 120mm Bass Radiator Assistant Woofer Metal Diaphragm For Jbl Xtreme Series 3-5 Inch Speaker Accessories 2pcs - Speaker Accessories - AliExpress