These are 9/16 wide, Heavy Duty clamps with 100% stainless steel construction including the screw! The diameter range of these clamps is 13/16 - 1 1/2 or 21-38mm. Breeze clamps are the strongest, highest quality hose clamps around and are still made in the USA. Don't settle for anything less! Patented Quadra-Lock construction makes a 4-piece clamp that can withstand much greater torquing pressures than the other brands of hose clamps.Meets and exceeds all SAE specifications. We are a professionally run business so you can have confidence in us. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Engine Cooling Components\Clamps & Hardware". The seller is "bjamsn" and is located in this country: US. This item can be shipped worldwide.