Description If you are looking for a professional and reasonably salinity hydrometer, then your research is here. That's because our products can meet your needs. It is made of plastic, glass materials and craftsmanship, durable and practical, and can provide you with stable working performance. Features -Color:As Shown -Material:Plastic, glass -Size:21.00X2.00X2.00cm/8.25X0.79X0.79in -Made of sturdy plastic, glass material, lightweight and durable, with excellent texture. -Easy to operate and use, suitable for professional and personal to use. -Compact and light, easy to carry and store, not taking up any space. -You can test your marine aquarium's salt level, provide an accurate test result. -Suitable for swimming pool, aquaculture, fish tank, water laboratories, etc.Package list: 1 x set of salinity meter