TJ Longda 50 pcs Stainless Steel Single Ear Hose Clamps size 1/4" or 6.5mm 1. Materials: Stainless Steel Band UNS S30400 2. Smooth inner circumference for 360 degree uniform seal; 3. To use in the industries like automotive, food and beverage, and so forth; 4. Precise tongue-in-groove seamless design.