Can I buy a collar or gland with adjustable aperture for a 100mm dia cat5e bundle through plasterboard ceiling ?

Joined
11 Feb 2011
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Dorset
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United Kingdom
I have a bundle of cat5e/cat6 and AV cables to go through a plasterboard ceiling down into a patch cabinet in my house. Above the ceiling is an accessible loft. I could drill a 110mm hole in the ceiling, put the cables through and then seal the gaps up with spray foam.

Is there a gland or conduit that allows me to seal the hole but let me unseal it later if I need to run more cables?

Thanks!
 
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