• The Swiss Bearings from Bones
• 6 Balls for Higher Speed and Greater Strength
• Industry Standard
• Single, Non-Contact, Removable Rubber Shields
• High Speed Nylon™ Ball Retainer
• Pre-Lubricated with Speed Cream™ Racing Lubricant
• Skate Rated™ Clearances, Tolerances and Materials
• Spacers Included