Suitable for speakers: no more than 2 inches high pitch, no more than 4 inches midrange
The middle hole is divided into two sections.
Install a 4-inch midrange speaker, then remove the washer to install a 102mm diameter 4-inch midrange speaker
Install a 3-inch 3.5-inch midrange and use the washer on the pad.

Specification:
Tweeter Outer Diameter: 58mm
Tweeter Inner Diameter: 47mm
Mid-range Outer Diameter: 102mm
Mid-range Inner Diameter: 85mm
Maximum width of bracket: 111mm
Bracket length: 270mm
Colour: as shown
Material: Plastic

Package Contents:
1 Pair x car speaker gasket(not included speakers)