BS4568 class4 and class 3 conduit - class 3 and class 4

BS4568 class3 and class4 conduit is produced compy with BS4568-1970 .
About the length and the thickness of the conduit ,we can produce according to client’s needed , we aslo can print our client’s brand .
the available sizes about the class 3 and class 4 conduit pipe is 16 mm , 20 mm ,25mm,32 mm ,
the genernal thickness is 1.5mm , exactly thickness is up to client's need , the lenght is 3mm, and 3.75m .