R188-2RS Full Ceramic Ball Bearing, the inner diameter is 1/4", outer diameter is 1/2" and the width is 3/16", this is a popular size that could be used in many applications, Bearing is made of Ceramic.

• Item: R188-2RS Ball Bearing
• Type: Full Ceramic Ball Bearing
• Cage: PTFE
• Closures: PTFE Covers (white)
• Balls: ZrO2 Ceramic (zirconia)
• Inner/outer races: ZrO2 Ceramic
• Dimensions: 1/4" x 1/2" x 3/16" inch
• ID (inner diameter)/Bore: 1/4" inch
• OD (outer diameter): 1/2" inch
• Width/Height/thickness: 3/16" inch
• Size: 1/4" x 1/2" x 3/16"
• Quantity: One Bearing