MotoRad Locking Pressure Relief Fuel Cap - 10421 Part #: 10421 Line: STA MotoRad Locking Pressure Relief Fuel Cap 1 Year Limited Warranty Cap Depth (in): 1/2 Inch Color: Silver Locking: Yes Material: Aluminum Neck Diameter (in): 3 Inch Shell Diameter (in): 4-3/16 Inch Shell Diameter (mm): 106mm Fuel Cap Venting: Pressure Relief Cap Depth (mm): 11mm Tether Included: Yes Show More Show Less