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>>15338282
https://twitter.com/RingWatchers/status/1645068911136604168

There have been 2 grid fin designs to date. The first debuted on B4 and was a 4x4 grid pattern. B7 introduced a new design with a tighter 6x6 grid. Both of these have been made of welded steel unlike those cut from a single titanium block on Falcon 9 . (5/10)

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