6.5" Poly Dome 4 Speaker - 4 Subwoofer Dust Cap Kit4x 6. 5" Dome Poly Dust Cap Kit These high density poly dust caps gain even more rigidity when glued in place. Whether you've lost your existing dust caps, damaged them, or destroyed them to make a repair. This kit includes 4 6. 5 in. "Dome style" high density poly dust caps that will handle the job on any speaker or subwoofer. Caps are meant to cover voice coils up to 4 1 2" in diameter. Kit includes: 4 6. 5" Diameter Dome style high density poly