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The Bunnings website only shows 50mm and 100mm posts for use with sleepers for a retaining wall. Although they do sell 75mm sleepers, I can't find the appropriate posts for a retaining wall. Do they sell them?
Welcome to the Bunnings Workshop community @JohnNC. It's wonderful to have you join us, and many thanks for your question.
Is it the Whites Retain-iT system you were interested in? If so, here's the full range of 75mm posts for your 75mm sleepers.
I'll include a step-by-step guide below, which you should find useful.
Please let me know if you need further information or questions.
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