... main products:rototiller gear series,pastoral management machine gear series,corn harveste series.tractor gear series,transplanter machine series,stubble gear series and ... the good sales service.The pic show the spur gear of the rototiller gear series.M=10,15z:22z,16z:24z,17z ... :23z,18z:22z,19z:21zWELCOME YOUR CONTACTING !Thank you! rototiller spur gear