Check the listing for details. Salinity Refractometer for Aquarium Seawater Marine Fishkeeping Salinity Test.... Condition: New. Listed at 21.16 USD. Salinity Refractometer for Aquarium Seawater Marine Fishkeeping Salinity Tester 0-100PPT & 1.000-1.070 Salinity Hydrometer Slatwater Refractometer with Automatic Temperature Compensation (ATC) Description Features: MEASURES ON 2 SCALES - Aquarium Refractometer features specific gravity (D20/20) 1.000-1.070 and parts per thousand 0~100 , allow to get two results in different units by one testWIDELY USE - Salinity Refractometer measures saltwater, salinity of water or seawater, ideal for aquariums, marine monitoring, fish-keeping, and saltwater poolsATC FUNCTION - Saltwater refractometer with automatic temperature compensation (ATC) function, allow you to obtain the accurate result faster and easierEASY TO USE - Put 2-3 drops of sample on the refracotmters prism, towards light, read the accurate readings through the optics eyepiece directlyDURABLE MATERIAL: The optic salinity tester is made of aluminum and ABS rubber, anti-rust, non-staining and resistant abrasion. Portable Refractometer comes with plastic case, mini screwdriver,a dropper and a cleaning cloth Product Details: Package Dimensions : 8.15 x 3.23 x 2.13 inches; 8.47 ouncesDate First Available : January 20, 2021Manufacturer : HallocoolBest Sellers Rank: #57,843 in Pet Supplies (See Top 100 in Pet Supplies) #9 in Aquarium Hydrometers#9 in Aquarium HydrometersCustomer Reviews: 4.5 4.5 out of 5 stars 461 ratingsItem Weight: 8.4 ouncesManufacturer: HallocoolDate First Available: January 20, 2021Item Package Dimensions L x W x H: 8.15 x 3.23 x 2.13 inchesBrand Name: HallocoolTarget Audience Keyword: marine fish-keeping aquairum saltwater testing Shipping Free fast shipping Return Policy All items qualify for returns within 30 days of receipt.