Barton Class 4 heavy gauge conduit hot dipped galvanised inside and out to BS4568/BS EN50086 part 1 gives a high level of corrosion resistance. One end of the conduit has a screw thread, the other end a coupler, allowing lengths to be screwed together. The lengths are used with galvanised circular boxes
, which can be screwed on, if the lengths are cut then a new thread can be formed with a conduit stock and die set
and the lengths can be bent with a Hilmor conduit bender
. Each length is 3.75m long and are sold in bundles of either 8 or 3 depending on the diameter.