Product Description Product Description Model No.Wpa/Wps/Wpo/Wpx/Wpz/Wpw/WpzRatio1:10,15,20,25,30,40,50,60ColorgreenMaterial Housing: Die-Cast Iron castWorm Gear-Copper-10-3#Worm-20CrMn Ti with carburizing and quenching, surface harness is 56-62HRCShaft-chromium...