QL Filters are recommended for use in various environmental and wet chemistry reference methods. Extremely pure cellulose filters of nearly 100% alpha content are specially processed to yield negligib

Use this felt-tip pen for permanent marking with black ink on glass and plastic items. Ink dries quickly. Markings on glass or plastic are not affected by repeated autoclaving.

TSS Filters are recommended for use in Standard Methods 2540 C and 2540 D. Optimized surface characteristics of this binderless borosilicate glass microfiber filter eliminates pin-holing and fiber-she

Dropper bulb slips over the end of Pasteur and other small volume pipets (approximay 1 mL). Latex.

Glass Micro Fiber Prefilters designed for use with the Xenosep Oil & Grease testing apparatus for EPA Method 1664A. Triple-Layer filter for fast throughput. 42mm, 48/PK.