These 3/8" tubular aluminum tie rods have wrench flats and a black anodized finish.
They are produced by Slack Performance Parts / PMI.

Tubular Tie Rod Kit Includes:
(1) 3/8-24 Tubular Tie Rod Kit with Right & Left Threads
(1) 3/8-24 Male Tie Rod End - Right
(1) 3/8-24 Male Tie Rod End - Left
(1) 3/8-24 Right Jam Nut
(1) 3/8-24 Left Jam Nut
**Kit Length is the length of the rod (not eye to eye)**
For eye to eye measurements add approx. 2" to the length of the tie rod