The 6.5” speaker ring bracket made of durable ABS plastic and good craftsmanship for durability and practicality. Easy to install. Utilizes existing vehicle mounting points, and requires no cutting or drilling. 6.5 inch plastic speaker spacer adapter ring allows for replacement speakers to be installed into the original aperture of your vehicle stereo system. 6.5 inch stereo sturdy speaker ring . Inner Diameter : 144mm / 5.67"; Outer Diameter:180mm/ 7.09"; Thickness: 15mm/0.59". Universal spacer ring works with most 6.5 inch speakers. Note: Please allow 1-2mm error due to manual measurement. 0.59 inch Depth extenders. With 6.5” speaker subwoofer spacer rings, you can install the speakers you want adding extra depth. Good for DIY Audio modification project.