Whats this hole for on a weber?

Sorry about the shitty picture, its the only one I could find quickly.

Cheers

[Edited on 17/5/04 by Northy]
Rescued attachment Weber hole.jpg

Hi It lets the air in to the jets, it you fit an air filter with back plate you have to keep it clear

read All about it here.........

http://www.locostbuilders.co.uk/viewthread.php?tid=13586