These are used with concrete mortice posts and are designed for fixing either concrete or timber gravel boards securely between the posts.
The 150mm (6″) cleats are the most common however if you need to double up on the height of your gravel board, the 300mm (12″) cleats allow you to do this.
You will need two cleats per gravel board and when fixing the 2.885m concrete gravel boards to the cleats, you will need to use M10 x 80mm bolts and M12 square plate washers.
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