18.5mm x 26mm x 4mm Double Metal Shielded, radial and deep groove ball bearing,bearing is made of 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.

• Item: 18.5 x 26 x 4 Ball Bearing
• Type: Deep Groove Radial Ball Bearing
• Balls: Ceramic 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/Height/thickness: 4mm
• Size: 18.5 x 26 x 4 mm
• Quantity: One Bearing