Rollerbones is the best for a reason.

 
Single, non-contact, removable rubber shield for easy cleaning and less friction; high speed nylon ball retainer for greater strength and speed. Ready to go for excellent performance and durability.

• Set of 16 bearings per pack
• Lubricated with low viscosity Bones Speed Cream
• Skate Rated clearances, tolerances, materials, and lubricant
• Removable high speed nylon ball cages
• Fast, long lasting, easy to clean
• 8mm only