Feature:1. STRONG HARDNESS: The linear bearing is made of Gcr15 bearing steel with heat treatment process and has sufficient hardness.2. FINE MADE: The linear motion ball bearing is fine made with higher precise and smoothly surface, can fit the device perfectly.3. HIGH SPEED: This flange linear ball bearing has low friction and high rotation speed, can be used in highly demanding locations.4. LASTING USE: The round flange linear bearing has low noise and strong bearing, not easy to heat, ensuring lasting durability.5. WIDE APPLICATION: This linear bearing can be used in gear box, instrument and meter, motors, household appliances, etc.Specification:Item Type: Round Flange Linear Ball BearingMaterial: Gcr15 Bearing SteelModel: Round D40Guide Shaft Support Inner Diameter: Approx. 40mm/1.6inUse: Can be used in gear box, instrument and meter, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, engineering machinery, etc..Package List:1 xRound Flange Linear Ball Bearing