One Ball Bearing 7x19x6 and are made of Chrome Steel, this  bearing are sealed with rubber seals to protect the bearing from dust or any possible contamination, these are self lubricated bearings (bearings are already greased).

• Item: 7x19x6 mm 
• Closures: 2 Rubber Seals
• Quantity: 1 Bearing.
• Material: Chrome Steel
• Quality: Electric Motor Quality
• Bearing dimensions: 7mm x 19mm x 6mm
• Inner Diameter: 7mm
• Outer Diameter: 19mm
• Width: 6mm