... dial, Waterproof 2.inside diameter--74mm OR 65mm 3.Color:blue, red, black, etc. 4.Fast delivery Waterproof silicon wristband with high quality ... .Specifications of RFID Wristband1) Material: silicone2) Dimensions: watch dial—oval; inside diameter--65mm; band width—20mm3) Color: ... easy to wear and use, waterproof, moisture proof, shockproof, and resistant to high temperature2) Working temperature: -50°C ...