Specification Brand : Fafeicy BulletPoint1 : [POM] The outside of the drive belt pulley is made of POM material which has certain elasticity, low friction and fatigue resistance. BulletPoint2 : The outside of the idler is made of POM material, which has certain elasticity, low friction and fatigue resistance. BulletPoint3 : Inner Hole Diameter: Approx. 5mm / 0.2in; Package List: 10 x Idler Pulley BulletPoint4 : Idler Pulley adopts motorgrade MR105 bearings, with high accuracy and low friction coefficient for stable support. BulletPoint5 : INNER HOLE DIAMETER: Approx. 5mm / 0.2in. These idlers have fine workmanship and standard size, and can perfectly replace old or damaged idlers. ItemName : Idler Pulley with Bearing, 10 Pcs Idler Pulleys, 5mm Inner Dia Drive Belt Pulley, MR105 Bearing Tensioner Pulley, Automotive Drive Belt Idler Pulleys ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 6 centimeters ItemPackageDimensions_Width : 6 centimeters ItemTypeKeyword : idler-belt-pulleys Manufacturer : Fafeicy ModelNumber : Fafeicy65b0e9iop4 NumberOfItems : 1 PartNumber : Fafeicy65b0e9iop4 ProductDescription : Specification: Item Type: Idler Pulley Bearing: MR105 Inner Hole Diameter: Approx. 5mm / 0.2in