Need woofer "Mass Ring" info..

[Speakertown]

This was probably discussed here before, but can't find anything.
Would like to know what weight mass ring (JBL) was used in which woofer.
I believe that there were different weight rings for various drivers.

[4313B]

I posted a chart years ago.

***

Googled "JBL Mass Ring", looked in Images and there it was:

http://www.audioheritage.org/vbulletin/showthread.php?1046-2225-2235-mass-control-ring&p=8821&viewfull=1#post8821

Note that the mass ring weight doesn't include the gob of glue required to hold it in place. ;)