Single-piece aluminum alloy housing.Factory-filled with premium Mobil Glygoyle 460 polyalkalene glycol lubricant – USDA Class H1 approved.Vent free design eliminates the potential for leaks.Premium, high-temperature Nitrile output sealsOversized high-speed bearings, positively retained for frequent reversing and start/stop cycles.Bronze alloy worm gear is centrifugally cast onto an iron hub for maximum strength, lubricity and superior life.Single-piece alloy steel input shaft and worm shaft.NEMA and metric flange options available.Mounting dimensions are interchangeable with many worldwide brands.