Holiday Return/Exchange Policy: For customers who purchase between now to December 25th, we will automatically extend the return/exchange date to January 31st. No restocking fee, no question ask, hassle free return. Salinity Refractometer for Aquarium, 0% - 10% Hydrometer, Most Accurate Refractometer has arrived! ONE OF A KIND! NO ONE ELSE CARRIES THESE! WE MADE THIS UNIT RIGHT HERE IN OREGON AND ITS THE MOST ACCURATE BEER WORT AND GRAPE MUST HANDHELD REFRACTOMETER IN THE WORLD! This dual scale salinity refractometer is used to measure, monitor and control the concentration of salt water and brine, especially useful for aquarium and marine applications. This high quality refractometer measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand and replaces your poor quality and difficult to read hydrometer. With just a couple of drops of aquarium water you know exactly what your salinity is. This refractometer does not need calibration solutions like some other refractometers. Simply use "everyday drinking water" to calibrate in 30 seconds upon first receiving or after a long dormant period. A refractometer is easier and more accurate than a hydrometer for measuring sugars. Features ATC (Automatic Temperature Compensation) for accurate readings. MADE OF STURDY ALUMINUM! It is 50% heavier than the other units that are selling for around $25-$30. Big deal? This is a true instrument, not a cheap toy! What happens when you drop the fragile imported units? Specifications Type Salt (ATC) Ranges 0 to 100ppt (10 to 30C) 1.000 to 1.070 Refractive Index Resolution 0.001 Accuracy 0.1‰ Dimensions 7.6 x 1.5 x 1.5" (194 x 38 x 38mm) Weight 8oz (227g) Included Accessories (1) Calibration Screwdriver (1) Carrying case (1) Plastic pipette (1) Manual Payments are accepted through Paypal. We ship through USPS Priority Mail, it usually arrives in 3 business days. International: We charge the same shipping cost to all our customers worldwide. Our default shipping is United State Postal Service First Class mail, it take 5-10 business days for delivery. we also offer Express Mail which only take 3-6 days. Handing time: 1 business day. We promise our best quality and the lowest price for our customers, if the item is not as the same as the description in the listing page, we will issue a exchange or full refund. if the item is the same as the description, we will charge a 15% restocking fee. Our goal is to place a profit margin of $1 ~ $3 per item and sell in volume. As such, the more you save the more we make. While the others are selling 1 item, we are selling 10 ~ 20 items due to our price reduction. Please use the "Ask Seller A Question" button. Please allow up to 24 hours for a response. Usually the buyer will get response in 6 hours. Track Page Views With Auctiva's FREE Counter