... cast iron or aluminum gearbox are available. NOSEN 2:1 bevel gear box RNV-Series,cubic shape of gearbox.Model: RNV ... RNV-200,RNV-260Function: right angles change transmission directionsConfigurations: spiral bevel gears,bearings,gearbox,input and output shaftsMaterials: 1.Spiral ... bevel gears: alloy steel,case hardened,be of high rigidity and ...