Rx HYBRID | MGP 75 PURPLE The Hybrid Polishing System consists of 1 ceramic ball and 6 steel balls.

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.
  
  
• 2 years Limited Warranty
  
  
• 1 Ceramic balls is silicon nitrate (1500 HV7)
  
  
• 6 Steel balls are 52100 carbon, chromium steel (HRC 67)
  
  
• Inner and Outter 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
  
  
• ABEC-7 rating, Ball deviation grade 5, Noise is under 31db.