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|6 x 15 x 5 Stainless Steel Ball Bearing|
with Si3N4 Ceramic Balls (Silicon Nitride)
6mm x 15mm x 5mm
6 x 15 x 5 Stainless Steel Ball Bearing, Quality is ABEC-5, Bearing is made of Stainless Steel, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination.