https://www.millsltd.com/filoform-duct-sealing-eneyor
FILOform Duct Sealing
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https://etechcomponents.com/products/filoform-filoseal-duct-seal/
Filoform FiloSeal+ Duct Seal - E-Tech Components
Feb 17, 2025 - Filoform FiloSeal+ Duct Sealing System (125mm: 282580, 200mm: 282590) suitable for sealing cables in one duct, allowing re-entry of the seal.
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