Serpent S400 Ceramic Ball bearings
Serpent have released 2 new ceramic ball bearings for use with the Serpent S400. Available in both 10×15 and 5×10, the balls used are extremely hard and ultra lightweight and make a great option for those who are looking for extra durability and an added weight advantage. Running extremely free, thanks to a specially selected lubrication, each bearing is sold in a pair and is a direct replacement for the original part.
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Source: Serpent [serpent.com]