Specification Brand : Othmro BulletPoint1 : Model : SK30 BulletPoint2 : Shaft Inner diameter : 30mm BulletPoint3 : Mounting screw diameter : 9mm BulletPoint4 : Distance of mounting holes : 64mm BulletPoint5 : 2 Pcs SK30 in package ItemName : Othmro Pack of 2, SK30 Liner Rail Linear Shaft Clamping Guide Support Shaft for Shaft Inner Dia 30mm ItemPackageDimensions_Height : 14.6 centimeters ItemPackageDimensions_Length : 3.1 centimeters ItemPackageDimensions_Width : 11.5 centimeters ItemTypeKeyword : linear-ball-bearings Manufacturer : Othmro Material : Aluminum ModelNumber : OTH191102Z-0102 PartNumber : OTH191102Z-0115 ProductDescription : The Linear Ball Bearings consist of a light-weight, aluminum housing to provide high strength and stiffness. compact design with High load carrying capacity, Linear Motion Bearing Unit is a rolling friction supporting element that usually used for linear motion mechanical parts with small friction. Coordinate with Linear Motion Shaft, recirculating balls provide unlimited stroke at low friction movement