Flame retardant, maintaining the integrity of consumer units and complies with 17th Edition Amendment 3. Saw tooth grip helps keep grommets permanently in place. For use with twin and earth cable and for blanking off holes (unsuitable for Mains/Tails cable). A useful and reliable cable entry kit for filling 20mm and 32mm knockouts. The pack includes seven 20mm and three 32mm grommets - they're easy to fit, with a saw tooth grip that helps to keep them permanently in place. These membrane grommet

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