Gear Box Big With Clutch- 2 Stage Combination Helical & Worm & Worm Wheel Gear Drive Wit H Hand Crank Insert, Internal Locking Feature, Oil Filled & Sealed Type Unit With Connecting Link On Output Shaf T For Elb Confirming To Rdso Spec. No.Rdso/Spn/208/2012 Ver. 2.0 Or Latest Suitable For Vidit Casting Elect Ric Lifting Barrier. [ Warranty Period: 30 Months After The Date Of Delivery ] ]