... , Waterproof 2.inside diameter--74mm OR 65mm 3.Color:blue, red, black, etc. 4.Fast delivery Waterproof silicon wristband with high ... quality from China IC Options of RFID Wristband1) LF (125KHz): EM4100,EM4200 ... dial—oval; inside diameter--65mm; band width—20mm3) Color: blue, red, black, white, yellow, grey, green, pink, etc.Features of RFID ...