Walker 4 Inch Steel Exhaust Clamp - 33319 Part #: 33319 Line: WAL Walker 4 Inch Steel Exhaust Clamp 1 Year Limited Warranty Clamp Type: Lap Joint Diameter (in): 4 Inch Material: Steel Nut Type: Hex Color/Finish: Satin Saddle Gauge (ga): 23 Gauge U-Bolt Diameter (in): 7/16 Inch Saddle Hole Shape: Round Show More Show Less