Tensioning Roller Product Type Tensioning Roller Bearing Number 2Z-C3 Bearing Type Ball Idler Bolt Thread Size M10 Idler Hole System of Measurement Metric Length through Bore 45 mm Maximum Belt Width 40 mm Outside Diameter 40 mm Overall Length 67 mm Roller Material Plastic Bearing Closure Double Shielded Bore Diameter 10 mm Compatible with Brand Rosta Compatible with Series 15 18 Hub Projection 6 mm Lubrication Self-Lubricating Maximum Operating Temperature 100 Degrees C