Bones Super Swiss 6 bearings in an 8 pack. Regular 608 bearings. Ball bearings (SS6) are fundamentally different from our standard 7 ball Bones Swiss. Super Swiss have 6 balls instead of 7 as you might expect, but the 6 balls are 20% larger in diameter than the balls used in 7 ball Swiss are. The reason we use 6 balls instead of 7 of the larger balls is also pretty simple, we can't fit 7 of the larger balls into the size constraints of the 608 bearing. Features - Single, non-contact, removable rubber shield allows for easy cleaning and less friction. - High speed Nylon� ball retainer for greater strength and speed. - Pre-lubricated with Speed Cream� racing lubricant - Skate Rated� clearances, tolerances, materials and lubricant provide the best performance and durability possible.