... 2. flat tyre studs 3.size:9-10,9-11,9-12,9-13,9-14all the specifications can be used in ... cars. Length(H)10 +/-0.15 mm,11mm,12mm,13mm,14mmHead Diameter(D)9 ... Motorcycle, ATV, Farm, Tractor: GRADECoHcDenRSHV30GRAIN SIZEJX0197.5-9.011.0-14.012.68-12.7850-901400- ... WC-80%+Co-10% Density: (g/cm3):13.0-13.5Hardbess HRA :>90(>1300HV30)TRS Mpa:(N/MM2):1660Poposity ...