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Rectangular post: 40*60mm, 50*50mm, 60*60mm, etc.
Peach post: 50*70mm, 70*100mm
Round post: 48mm, 60mm
Clips: Plastic, Metal
1> Straight post from top to below and bury it directly in the earth.
2> Post with a steel plate, fixed with expansion screws on hardened ground.