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Hi Andrew, not a single one..
Be careful, it seems 150mm rings (for tube with outer diameter 150mm) are not standard.
And, it seems Skywatcher is even labeling them wrongly: Andrew from Bintel ordered a pair for me and when they arrived we discovered they were made to accomodate 180mm dia tube.. (for 150mm mirror ?? this is just a wild assumption to explain the discrepancy)
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