These are Replacement Uprights for the Tamiya TA01 chassis.
These are also referred to as steering knuckles.

FEATURES: Red plastic construction

INCLUDES: Two steering knuckles

REQUIRES: Cutting parts from parts tree.

SPECS: Length: 23mm (0.90")
Height: 26mm (1.03")

COMMENTS: These can be used on: Dirt Thrasher, Blazing Star, TLL-01B, TA02W,
XB Super Manta Ray.