1) iteam: BS 4568/31 conduit
2) material: galvanized steel
3) size: bs4568: 20mm( outside diameter 19.7mm~20.0mm, wall thickness: class1 1.6mm class2 1.35mm, length 3.75 meter)  25mm, 32mm.
              bs31: 3/4'' ( outside diameter: 18.8mm~19.1mm, wall thickness: class1: 1.6mm class2: 1.35mm, length: 3.75meter ) 1'', 1-1/4''
4) standard: BS
5) brand name: AWQ
6) finished galvanized
7) technique: welding
8) usage: this bs4568/31 is used for wire or cable installation and protection.