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1STec 1.5m Underground Cable Conduit Ducting Hose Pipe Channel for TV Coax, Electric Wire, Garden Lights, Fish Pond Low Voltage Pumps, Power Socket Lead Burial (1.5 Metre, 20mm External 14mm Internal): Amazon.co.uk:
63/50mm ELECTRIC POWER 5M UNDERGROUND TRENCH CONDUIT CABLE DUCTING BLACK + TAPE | eBay
How to install underground utility ducting pipes | JDP
1STec 100m Underground Cable Conduit Ducting Hose Pipe Channel for TV coax, Electric Wire, Garden Lights, Fish Pond low voltage pumps, Power Socket lead Burial (100 Metre, 20mm External 14mm Internal): Amazon.co.uk:
Cable Duct Systems NZ - Rigid & Continuous | Marley