This type of cap is designed to close off canalisation which is yet to be cabled.
Using a simple lever system, it does not require any special tools for assembly. The expansion joint ensures that the unit is water-tight and ensures that no small animals or objects that could obstruct the conduit can enter.
The body of the cap, the packing bolt and its corresponding fixing ring for the guidance wire, in addition to the expansion lever are made of Polyamide. The expansion joint is made of thermoplastic rubber.