Thomas Lab Label Maker Tape, 3/8" Width, Blue (Pack of 4) Lab label maker tape Self-adhesive colored tape sticks powerfully to any surface including glass, plastic, metal, rubber or wood Label tape can be unloaded and reloaded in less than 30 seconds No batteries needed, unit is always ready to use Raised white letters on 3/8" (9mm) wide tape are readable from 8 feet