Fuel Tank Nipple
Aluminum Nipple is designed to fit in all Sullivan tanks.

It can be used for an extra fill or pressure port, and will accept standard and large tubing.

This nipple will also work with bladder systems.
3/32 to 5/32 Aluminum Fuel Tubing Adapter
Aluminum Tubing Adapters. Handy for adapting large fittings to smaller fittings, such as muffler nipples or gasoline carb fittings. Kit contains two adapters, plus short lengths of gasoline and glow fuel tubing.
Nev-R-Leak Fuel Tank Accessories

For more information and option to buy link to:
www.sigmfg.com