Mandrels are used to proof clearance in the conduit after backfilling and prior to hauling cables through. The relevant authority that the job’s specification is working towards will determine what conduit proof is required e.g 90% or 96%. They are designed with wire eye at each end to attach your rope to for hauling.
Mandrels are measure by the OD and are available in standard sizes including 14mm, 18mm, 24mm,28mm, 32mm, 38mm, 40mm, 47mm, 48mm, 52mm, 60mm, 74mm, 78mm, 88mm, 96mm, 113mm, 118mm, 130mm, 138mm and 184mm. Custom mandrel sizes are available upon request.