Delrin Acetal Threaded Rods RH,  White, 1/4"-20 x 4 Foot Long 

Light weight, Chemical Resistant, can be used in corrosive environments.  Non Conductive.
They do not absorb moisture like nylon and fiberglass rods, so they're good for use in wet environments. Alcohol, gasoline, and solvent resistant.

Maximum temperature is 180° F.