On 1 Dec, 23:01, Harry Bloomfield
wrote:
Eric explained on 01/12/2008 :

Ideally it would be about 10mm long on each arm of
the right angle and an internal diameter of about 5mm although size
isn’t critical.

Bit late for OP maybe, but came across these today (two-thirds or so
of the way down the page) and recalled this thread.
http://www.tradetiler.com/acatalog/s...ing_tiles.html


or heat up the plasticnipplethat most silicon sealants are supplied with and form a right
angle in it before it cools.

Nozzle, usually. Nipples are generally a bit shorter in my experience.