Made from 6061 Billet. 
Right Rear Birdcage is a Dual bearing carrier.
Left Rear Birdcage is a Single bearing carrier.
Adjustable pickup points ranging from 6 3/8" - 5 5/8" or 4 5/8". Birdcages come with all bearings and hardware for a 31 splined 2" axle. 
 
(SOLD AS A SET)