FULL CERAMIC ZrO2 627 7x22x7mm INLINE/QUAD SKATE SCOOTER BEARING SKATEBOARD
FULL CERAMIC ZrO2 627 7x22x7mm INLINE/QUAD ROLLER SKATE BEARINGS. When we talk about ceramic bearing, we are typically talking about a couple of types, there is the Zirconium dioxide commonly referred to as ZrO2 (it's formula).