I needed something to convert 3" cores down to 2" cores since my spindle adapters broke on my z6200 and I didn't want to spend $150 to replace them. These work great so I thought I'd share.
http://www.amazon.com/Core-Adapter-Wide-Format-Media/dp/B00W8BMQY2
http://www.amazon.com/Core-Adapter-Wide-Format-Media/dp/B00W8BMQY2