Description Oversized Neck Radiator Cap 15 lbs Replaces Gates: 31350. For use on heavy-duty trucks, buses and tractors. Fits applications with 3/4″ deep filler necks. Attachment Type Cam On Cap Depth (IN) 1.14 Cap Finish Stainless Steel Color Silver Coolant Recovery System Closed System Filler Neck Depth (IN) .75 Filler Neck Inside Diameter (IN) 2.13 Filler Neck Inside Diameter (MM) 54 Filler Neck Outside Diameter (IN) 2 Filler Neck Outside Diameter (MM) 51 Height (IN) 1.14 Lever Type No Material Stainless Steel, Rubber Quick Pressure Release No Shell Outside Diameter (in) 2.81 Type Heavy-Duty B Size Filler Neck Cap Vented Yes Width (IN) 2.71 Reference Numbers 33027, 7031427, 31350