High Temp Silicone Wtaer Line Tubing (5/32" ID x 5/16" OD).  Industrial strength for high temperatures on metal fittings.  Available from Lavigne Marine at a low cost.  Can be purchased by the foot or in packs of 10 or 20 feet.

Savings when purchased in larger packs.  May be one continuous length if more than one pack is chosen.

Black color to keep your boat looking clean with the slime hidden.