The Breeze 640H Power-Seal is a heavy-duty stainless steel hose clamp designed for demanding automotive and industrial applications. It features a corrosion-resistant 300 series stainless steel band and screw with "Square Knot" interlocking construction that prevents pull-apart failure. This worm-drive clamp has a 1/2-inch band width for superior sealing and conforms to SAE J1508 Type F standards. It provides reliable secure connections for coolant fuel oil vacuum and emission system hoses.