TJ Longda 50 Pieces Stainless Steel Single Ear Hose Clamps Size 1/2" or 13.3mm (NOT Pex Clamps) 1. Made of Stainless Steel Band UNS S30400. 2. To use in the industries like automotive, food and beverage, and so forth. 3. Smooth inner circumference for 360 degree uniform seal. 4. Precise tongue-in-groove seamless design. 5. Not Pex Clamps and Do not apply to 1/2" Pex pipe.