Bring high-resolution printing to your small-volume tube labeling with these 0.375-inch Laser Tough-Spots®. This bulk pack is perfectly suited for labs with high-throughput needs, allowing you to print thousands of cryogenic labels directly from your standard office laser printer. The 3/8" diameter is expertly sized to fit the caps of 1.5ml and 2.0ml microtubes without overhang. Engineered to withstand the most extreme lab conditions, these labels will remain adhered and legible from liquid nitrogen at -196°C to boiling water baths and dry heat up to 150°C. Key Features & Benefits: Perfect Fit for Microtubes: The 0.375-inch diameter is specifically designed for a neat and secure fit on the tops of 1.5ml and 2.0ml tubes and vials. High-Volume & Cost-Effective: With 3,840 labels per pack, this is an economical choice for labs with extensive sample collections. Desktop Laser Printer Compatible: Formatted on standard 8.5" x 11" sheets to work seamlessly with your existing laser printer for easy, convenient batch printing. Extreme Temperature Resistance: Built to endure a remarkable temperature range from -196°C to 150°C, making them ideal for cryogenic storage, autoclaving, and dry heat applications. Chemical & Solvent Resistant: The chemically inert material and strong, solvent-resistant adhesive ensure your printed information remains intact, even with chemical exposure. Strong & Permanent Adhesion: Engineered to stick securely to small, curved surfaces even through extreme temperature shifts and processing.