Sprocket Wheel Set Product Type Sprocket Wheel Set Chain Number 80 Bearing Type Ball For Number of Strands Single For Chain Pitch 1 in Idler Bolt Thread Size M20 Idler Hole System of Measurement Metric Length through Bore 12 mm Number of Sprockets 1 Number of Teeth 13 Sprocket Width 12 mm Standards ANSI DIN 8187 ISO 16 B-1 Bearing Closure Double Shielded Bore Diameter 20 mm Compatible with Brand Rosta Compatible with Grainger Part Number 798K96