With 20 µm of galvanisation, pre-galvanised DuraPost are guaranteed for up to 15 years*. For enhanced resistance to corrosion the steel posts can be powder coated to BS 13438 providing a guarantee of up to 25 years (exclusions apply). All powder coatings are salt spray test to 1,000 hours to BS 3900F4, impact resistance to BS 3900E3, scratch resistance to BS 3900E2, and humidity minimum 1,000 hours to BS3900F2. DuraPost is a patented cold rolled galvanised steel (DX51D Z275NA-C) fence post system manufactured to EN 10346. Lightweight yet stronger and more durable than traditional fence posts, DuraPost offers a maintenance-free fence post solution for both residential and commercial applications.