Easily update old information and create jewelry price labels, cable management labels, power cord labels, and more with Avery TrueBlock 1/2" x 2-1/2" Matte White Barbell Labels. Easily revise old labels with Avery TrueBlock technology. The proprietary TrueBlock feature completely covers up markings and printing so that none of your old data shows through. Sure Feed technology reduces jams and smudges by creating a more reliable feed through your printer. Easily customize jewelry labels, tamper-evident labels, and more with your own art, symbols, and messaging by using the templates and designs on the Avery website.