Twinwall Ducting Coils Black Electric & Ridged Twinwall Ducting From The Southern Distribution Depot manufactured in HDPE . The corrugated external wall giving excellent impact resistance strength & durability . Flexible and light weight , all twinwall ducting coils come with a draw cord strings allowing cables or pipes to be pulled through after installation , Ridgid Lengths & 90d 45d & 22.5d bends also stocked. Class 2 BBA Certified
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