Heavy-Duty Silver U-Bolt Exhaust Clamps - Suitable for Expanded Pipes, Available in Sizes from 1 Inch to 6 Inches

C01 - 1" (25.4mm) C02 - 1 1/8" (28.6mm) C03 - 1 1/4" (31.8mm) C04 - 1 3/8" (34.9mm) C05 - 1 1/2" (38.1mm) C06 - 1 5/8" (41.3mm) C07 - 1 3/4" (44.5mm) C08 - 1 7/8" (47.6mm) C09 - 2.00" (50.8mm) C10 - 2.25" (57.2mm) C11 - 2.25" (57.2mm) C12 - 2.50" (63.5mm) C17 - 3.00" (76.2mm) C18 - 3.50" (88.9mm) C19 - 4.00" (101.6mm) C20 - 4.50" (114.3mm) C21 - 5.00" (127.0mm) C22 - 5.50" (139.7mm) C23 - 6.00" (152.4mm)