Rx STEEL | MGP 710 GREEN
The Rx Steel bearings have 7 steel balls.

Specs:

Material Composition
Steel balls are 52100 carbon, chromium steel (HRC 67)
Inner and Outer raceways are 52100 carbon, chromium steel (HRC 67)
Retainer is 6/6 Nylon + special additive making it more resistant to breakage
Pre-lubricated with Rx Lube Drops, a low viscosity oil to reduce friction

Tolerances
ABEC-7 rating, Ball deviation grade 10, Noise is under 31db.

Design Features
Balls are highly polished to a mirror like finish
Inner and outer races are highly polished to a mirror like finish
Raceway is optimized for the ball and raceway contact area and contact angle.
Removable non-contact rubber shields for easy cleaning and zero friction.

Limited Warranty
1 Years