About me - Made from plastic which is resilient material and can be expanded a little if it does not fit tightly in the drilled hole - Keeps cables in place for easy access and allows them to be directed as desired - Round shape - circular grommet holes are best cut with a hole-cutter - Comes in grey colour - Opening style is flexible opening which resembles a sliced pie with flaps that opens to allow you to get through multiple cables for your convenience - RS Pro 839-9819 come in 80mm cut-out diameter - Easy to install