4x9x4 Ceramic Rubber Seal
- 4mm Inside diameter
- 9mm Outside diameter
- 4mm wide
- mr684 mr 684 2rs 4x9
- Abec 5
- Light oil
- Ceramic Silicon Nitride Si3N4 balls
- Chrome steel races and retainers
- Rubber seals
Ceramic Hybrid
Ceramic Hybrids last up to 10xs longer than Chrome Steel bearings. These are used in applications where high speed, load and temperature are a factor. Ceramic balls are harder and rounder than stainless & chrome steel, so therefore they offer less rolling resistance.