Size 608 8mm x 22mm x7mm Ceramic Si3N4 Skate ...
2020-9-8 · Silicon Nitride balls weight 79% less than tungsten carbide balls. Since these bearings have become more cost efficient, the production volume has increased, and although these bearings cost 2-5 times more expensive than normal bearings, their superior performance and life justify the expense. ITEM SPECIFICS: Item: 1 Ceramic Ball Bearing.
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