sprinkler gears:high precision,GB6 class,low nosy ,products in warehouse,mini order :1pic sprinkler parts : 4 pieces is one set , it is used in sprinkler gear box .The followings are the details:The name of the gearbox :CLW80QZF-60/90,CLW80QZF-40/54.Material: GB 40Cr. Heattreatment :Quenching & tempering ,HRC45-50Accuracy Class: GB6(same as DIN6,ANSI3,JIS2)Finish of the teeth:Gb0.8 Grinding the ...