flashing ring

flashing ring

[′flash·iŋ ‚riŋ]
(engineering)
A ring around a pipe that holds it in place as it passes through a partition such as a floor or wall.

flashing ring

A collar around a pipe to secure it as it passes through a wall or floor.
References in periodicals archive ?
At the North Central branch, ringleaders such as Carolyn Read of Bolton, pay $100 to wear an attention-grabbing flashing ring that generates questions and, hopefully, donations.
London's circular has promoted a ClearSounds phone with an extra-large key pad and a bright flashing ring strobe.
Over 100 guests were given glow sticks and neon flashing rings as they enjoyed cocktails including 'Sex on the Beach' and 'Blue Lagoons'.
The other toys include football bobble head cake decorations, Shrek the Third and Spider-Man 3 flashing rings, children's jewellery and toy gardening tools.