Benchmark Water Sample Vials Glass sample vials designed for Benchmark Reef Aquarium Water Chemistry Test Kits. Each vial holds up to 10 mL of water and includes a clear 5 mL line for consistent sample collection. Durable glass construction for long-lasting use Graduated markings up to 10 mL with a clear 5 mL indicator for test samples Screw-on cap with ribbed grip and Benchmark logo for a secure seal Compatible with all Benchmark reef water chemistry test kits Reusable and easy to clean between tests Specifications Capacity 10 mL total volume (5 mL recommended for testing) Material Glass vial with polypropylene screw cap Use Benchmark reef aquarium test kits and general water sampling How to Use Rinse the vial with aquarium water before collecting your sample. Fill to the 5 mL line for Benchmark test kit procedures. Cap securely and follow the instructions in your selected test kit. After use, rinse thoroughly with fresh water and allow to air-dry. What’s Included Benchmark Water Sample Vial(s) with screw cap. The Benchmark Water Sample Vials are durable, easy-to-use glass containers built for reef aquarium testing. They are ideal for collecting 5 mL samples for Benchmark kits, with a total 10 mL capacity and a secure screw-top lid.