5/16" is 7.94 mm
1/4" is  6.35 mm

I'd go with the 1/4"   if 7mm is not available but keep an eye on it
for stress cracking where it's stretched.

On Tuesday, December 26, 2006, at 06:04 PM, Automatic digest processor
wrote:

> Date:    Tue, 26 Dec 2006 13:13:44 -0800
> From:    Old Volks Home <oldvolkshome@GMAIL.COM>
> Subject: Re: 5/16" High Pressure Fuel Lines OK?