Smooth & burr-free inside and 360 degree inner ring precision design prevent damage to the pipeline effectively. Release or tighten the bolt to adjust the hose clamp diameter range. 10/20/50pcs Inner Diameter 5mm ~ 18mm 65MN Manganese Steel Galvanized Spring Hose Clamp Elastic Steel Buckle Water Pipe Hoop Reusable, , flexible and practical. The spring clip is designed to distribute pressure evenly around the application area. Used to fasten hose joints. It is recommended to use when the hose is subjected to rapid temperature changes. The spring clip maintains pressure during this process to prevent leakage., Manufacturer: KSeSii