Precut Label Roll, For Print Method Direct Thermal, Compatible Grainger Part Number 23M340, 4NHL6, 4NHL7, 506L38, Compatible Mfr Part Number 1752264, 1752265, 1752266, 1755120, 2133382, 2133383, Label Color White, Label Finish Semi-Gloss, Label Height 1 in, Label Material Polypropylene, Label Width 1 in, Labels per Roll 850, Printer Series Compatibility 450, 450 Turbo, 4XL, LabelWriter, Vial/Tube Size 25MM X 25MM, Adhesive Properties Permanent Adhesive