18.5x26x4mm Ceramic Ball Bearing & Stainless Steel

18.5 x 26 x 4 Ceramic Balls (Si3N4) Stainless Steel Shielded Ball Bearing1 Ball Bearing 18.5mm x 26mm x 4mm Double Metal Shielded, radial and deep groove ball bearing,bearing is made from stainless steel with Ceramic Balls (Si3N4),bearing is closed with 2 Metal Shields, one Shield from each side to protect the bearing from dust or any possible contamination,bearing is sealed and self lubricated,.Most common application is the Align RC helicopter engine. 18.5 x 26 x 4 Ball Bearing Deep Groove Radial Ball Bearing Ceramic Balls (Si3N4) Material: Stainless Steel Closures: Double Metal Shields Dimensions: 18.5mm x 26mm x 4mm/Metric ID (inner diameter)/Bore: 18.5mm OD (outer diameter): 26mm Width: 4mm Size: 18.5 x 26 x 4 mm Quantity: 1 Bearing