This is an optional ST Racing Concepts CNC Machined Aluminum Shock Collar Set, and is intended for use with the Losi TEN-SCTE. The aluminum shock collars feature an O-ring, that when installed will securely hold your adjustment in place on the shock bodies.
ST Racing Concepts Aluminum Shock Collar Set (Blue) (4)
There is no performance upgrade as far as the materials or size goes for the SCTE 2.0, but man they sure break up the shock with a custom look! They fit tightly, but thread precisely. If your running 1.0 plastics, or are like myself with the 2.0 and just want to boost the overall look of your setup, I would highly recommend these to anyone for said reasons.