JBL GX428 GX SERIES 4" 2-WAY CAR SPEAKERS W/POLYPROPYLENE WOOFER CONES PAIR
Woofer Composition: Polypropylene. Woofer Surround Material: Rubber. Minimum Frequency Response: 75 hertz. Maximum Frequency Response: 21 kilohertz. Product SKU: JBL-GX428. Put the completed RMA FORM inside the box with your item.