I have no idea what a Brunswick black is. But the Magnum is of Ebonite make (Here, Prataman, prataman, prataman...). They have a couple of older Magnums - numbered 5, 10 and 12. I suspect the XL5 is an "
X-tra
length" version of the Magnum 5. FYI, the Magnum 12 is a urethane, while the Magnum 10 was rubber. That's all i could get.
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Always remember: It's easier to spare from a channelball than a split.
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