I'd get Several other things though. The Tower stuff can be a pita to chop. Alternatively brittle and has a tendency to shatter. On new builds, plasterers can plaster around capping a lot better than oval conduit, if fixed on to the blockwork. John Williamson said: 20mm for 4m2? 25m? https://ovalconduit56788.glifeblog.com/35540386/top-oval-conduit-secrets