In a message dated 10/27/05 1:08:04 PM, kayakjr@JUNO.COM writes:

<< Soory - thought the title said it all!

It's for fuel lines - the 7mm ID ones that feed fuel from tank to the
injectors
Clamps are specified by diamter (typically a range). >>

John,

The subject line does say it all . . . if it's read.

The fuel hose is 7 X 3 mm, so its OD is 13 mm.  I've used the smooth-band,
machine screw type hose clamps for this application in two different sizes: 11.0
- 13.3 mm (7/16" - 17/32") and 12.0 - 14.3 mm (15/32" - 9/16").  I found both
sizes to work, only the larger will slide over the bulge in the hose caused
by the barb on the fitting without undoing the screw of the clamp.

George