Boston Acoustics A400 Complete Refoam Kit
This is the correct kit that fits on the dual 8" woofers and the 6" midranges.

Each Refoam Kit includes all the materials needed to repair four (4) woofers and two (2) mids:
- Refoaming Instructions
- Two 6" and four 8" Foam Surrounds
- Shims For Centering the Voice Coils
- Kit comes with two 2.25" Screen(thin fabric) for the mids and four 2.75" Screen Dust Caps for the woofers
- Bottle of Specially Formulated Foam Surround Adhesive

*It can be very difficult to refoam a speaker without removing the dust cap and inserting the plastic shims. The plastic shims are used to center the voice coil and cone assembly while the speaker is being refoamed. If you do not use the plastic shims, the voice coil may be off center and it may lead to the voice coil rubbing.

8" Woofers
A - Outside diameter of the surround = 7.75"
B - Roll ends = 7.125"
C - Roll starts / O.D. of the cone = 6"
D - Inside diameter of the surround = 5.5"

6" Midranges
A - Outside diameter of the surround = 5.95"
B - Roll ends = 5.375"
C - Roll starts / O.D. of the cone = 4.625"
D - Inside diameter of the surround = 4.4"