Need a simple, reliable clamp for hoses or tubing? These MroMax constant tension band clamps are super handy. You get 5 of them in a pack. They're made from 65Mn manganese steel, which is strong, springy, and durable, with a blackened finish to resist rust. The inner diameter when relaxed is 25mm (about 0.98 inches). They have a constant tension spring design, which means they automatically adjust and maintain a tight seal as the hose expands or contracts with heat – way better than a standard screw clamp for some applications. They're perfect for fuel lines, silicone hoses, coolant hoses, air lines, or water pipes on cars, motorcycles, or other equipment. They're also used in marine, aviation, and agricultural settings. Important sizing tip: Measure the OUTER diameter of your hose/tube. Choose a clamp size where the MAXIMUM clamping diameter is closest to your hose's OD. For a 25mm hose, this 25mm (ID) clamp is a good match. Material thickness is about 1.2mm. A versatile, professional-grade clamp set for various projects.