Depending on the type of brace, I believe. For braceless you need 15mm. Some forumers seemed to have braceless 422 with 12mm. Tank manufacturers whom I checked with all told me that 12mm does not meet the 'specs' of braceless tank. Check with the tank manufacturer whom you got your quote from. Their reputation are on the stake and they should advise you accordingly.Originally Posted by samuelgoh
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