Structure of bearing model 608: Inner & Outer Ring + Cage + Steel Balls + Grease + Rubber Sealed = 608 BearingOur 608 bearing is pre-lubricated with grease: The main purpose of lubrication is to reduce friction and wear inside bearings that may cause premature failure.With nylon plastic retainer..
Ramps 1.6Ramps 1.6 is optimized and launched based on Ramps 1.4 & Ramps 1.5The Structure almost same as Ramps 1.5 , the difference is Ramps 1.6 have new 2pin connectors, which more simple and convenient to connect, also will not be burnt easily, what's more ,Ramps 1.6 have a good Heatsink above ..