Hartwii Black on White Cassette Compatible for Brother Security TZ-SE4 TZe-SE4 Label Tape 18mm x 8m (3/4 x26") Suitable for Brother P-touch Serial Label Printing Machine Model number:TZ-SE4 /TZe-SE4 Security Label Tape Size: 18mm x 8m / 3/4x 26" Security Label Tape