... tyre protection chain are:1)-Reducing your operating costs.2)-Lowering your downtime.3)Increasing your productivityProduct Description ... hoursSedimentary Rocks Service LifeCalcium Sandstones, Quartz Sandstones1,300~2,000 hoursGreywacke2,800~4,000 hoursVolcanic Tuff3,000~9 ... Life Marble3,500~6,000 hoursQuartz Rocks, Schist 1,350~2,100 hoursEclogite, Gneissose2,000~3,000 hoursOther Applications Service ...