Features-quality ABS material, it is strong and has a long service life.- You will receive 4 pairs of car speaker spacers, enough to meet your needs.- Reasonable design makes it have a simple operation method and save labor.- Utilizes existing vehicle mounting points, and requires no cutting or drilling.- These practical speaker spacer rings that can be used in car, boats, trucks, RV, more.- Material: ABS.- Made of high- Size: Outer diameter: 16.8cm, Inner diameter: 14.5cm, Thickness: 1.5cmDescription These are some car speaker spacer adapters, carefully selected high-quality ABS materials, and have a long service life. Although their design is simple, they are very practical. This car speaker adapter allow replacement speakers to be fitted into the original apertures of your car audio system.Packing list: 4 Pairs x Car Speaker Spacers Rings