
Be sure to measure the taper as accurately as possible. Make sure the roll starts and stops at the edge of the cone and the edge of the frame. If the sizes aren't listed (which is usually the case with most cheaper foams, but not all) then expect to risk the sizing and please post the actual size here for others to see. Or let us know which speaker you have installed with them and we can size based on that. I found that none of the 8" rims I bought for one of my difficult sizes fit Boston, most JBLs, most Infinity and not Snell. I've been buying these for years and these sizes are very hard to come by. Cutting the foam to add or remove a section and trimming the interior and exterior has been done but is not recommended. Parts don't quite fit these speakers from what I saw in their published sizes and what I measured was far from perfect and most of them were unsuitable for the speakers they said would fit . So be careful and check the sizes before you buy things. Just because the seller said it would fit.

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