TJ Longda 50 Pieces Stainless Steel Single Ear Hose Clamps Size 3/4" or 19.8mm (NOT Pex Clamps) 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; 5. Not a Pex Clamp and does not apply to 3/4" Pex pipe.