... thickness is 12mm-20mm, the plate with hot-dip galvanized;pole: iron material, inside & outside with hot-dip galvanized, top ... 200mm-250mm, bottom dimension : 560mm-630mm, thickness : top :6mm, bottom :10 mm;lifting system: with high quality auto-pump after you ... ,uniform luminance sidtribution.Flat glass and optional drop lens changeable. Pole Material:Poles are made by the high-quality metal plants ...