SR144TLZN W&H Dental Handpiece Hybrid Ceramic ABEC-7 Ball Bearing. Made of stainless steel and has Solid Si3N4 Ceramic balls. Cage is made from Torlon for lowest friction, long life and highest speed. Bearing is closed from one side by one metal Shield

• SR144TLZN W&H Dental Handpiece Ball Bearing
• Deep groove ball bearing
• Material: Stainless Steel
• Quality: ABEC-7
• Closures: One Shield
• Balls: Si3N4 Ceramic
• Balls retainer: Torlon
• Speed: 400,000 RPM
• Size: 3.175 x 6.35 x 2.38 mm/Metric
• Dimension: 1/8″ x 1/4″ x 3/32″
• Quantity: 1 Bearing