... Type (+):Red (-):Black Operation Temperature:-10°C ~+70°C 35%-85%RH Storage Temperature:-40°C ~+80°C 35%-85%RH Motor protectionImpedance ProtectedReverse ... bearing( Duration :25,000h/25°C,p/vt) "X"=B: One ball bearing( Duration :50,000h/25°C,p/vt) "X"=L:Lashy ... bearing( Duration :45,000h/25°C,p/vt)---Patent Listed ...