These are L-Style Nylon Control Horns.
One Right & One Left Control Horn.

FEATURES: Nylon construction

INCLUDES: One right control horn w/4 adjusting holes and 2 mounting holes * One left control horn w/4 adjusting holes and 2 mounting holes * *(1-1/8″ long {tall}) Two mounting plates w/2 mounting holes (5/8″x1/4″) Four 2-56×5/8″ round head screws

REQUIRES: A flat head (slotted) screwdriver

SPECS: See “includes” above