Full Size Wormdrive Duct Clamps 12.7MM Wide Band,0.6mm Thick Band SAE J1508 Standard Perforated Band Made from Stainless Steel or Metal Adjustable diameter Easy use Most common sizes below SAE#12 18-32mm(1-1/4") SAE#16 21-38mm(1-1/2") SAE#32 40-64mm(2-1/2") SAE#36 46-70mm(2-3/4") SAE#48 65-89mm(3-1/2") SAE#64 91-114(4-1/2") SAE#72 105-127(5")