[Towertalk] Newbie help with coax routing

[Marty N5NW]

I've just put a contract on a home and am looking forward to getting the
antennas up.  Some time back I saw a manufactured "header" block that fit in
a window, providing a weatherproof entry point for coax.  Thought I might
use something on that order until I could get routing determined and coax
pulled through the house.  Just can't remember who manufactured the device,
or what it was called.

Anybody remember this device?  Know where I can get one?

tnx de N5NW/8 (Marty)
Bellbrook, Ohio