Height Adjustable Elevated Post Base. Ideal for pergola, veranda and awning post-construction. The major advantage of PR base is that it can be adjusted after installation and does not require machining. PR post bases are made of galvanised steel according to CE Certificate requirements. Fix to the foundation with M10 anchors. fix the post using M10 Can be adjusted with a 30mm wrench after both plates are attached coach screws. Not recommended when the top of post/column is not restrained (e.g. fence post).