265 is the nearest to 300, same width but 4.5 projection instead of 4.8.
325 is the nearest to 340, same width but 4.7 projection instead of 5.
this is the full projection implant.
or you could have the same width with bigger projections, with the extra full projection implant.
310 would be the same width as 300 but 5.4 projection instead of 4.8.
375 would be the same width as 340 but 5.7 projection instead of 5.
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