Comes WITH Calibration fluid! The other ones do not! ASK them! Many in stock! Ships ASAP from the USA! These Refractometers specifically measure Brix (Bx) levels in liquid, or the mass ratio of dissolved sugar to water in a liquid Brix 0-10%: For industrial fluids and low concentration juices Brix 0-20%: For industrial fluids and low density solutions Brix 0-32%: For industrial fluids, fruit juice and soft drinks Brix 28-62%: For industrial fluids, high concentration juices, canned goods and high sugar solutions. Additional Details ------------------------------ Package quantity: 1 International Shipping: Shipping will be via US Postal's Air Mail/Global Priority (3-8 business days) is $15.00 ($12.00 to Canada) . There can be Customs delays, and there aren't any Tracking Numbers. WE ARE NOT RESPONSIBLE FOR CUSTOMS DELAYS OR LOST PACKAGES! We get the packages to the shipper, they ship it to you. Don't worry! They do have wonderful service and assist in reducing your import taxes. Buy more items, for a total of 2 portable refractometers, and the shipping charge is still just $15.00 (world)/$12.00 (Canada) via the Air Mail/Global Priority! Of course, you'll have to win this auction to get the first item! Air Mail/Global Priority: World: $15.00 Canada: $12.00 For an additional $15.00 you can upgrade to USPS Express Mail (which takes 3-5 business days) and includes Shipping Insurance to $100.00, Delivery Confirmation and a Tracking Number. National Industrial Supply 30777 Rancho California #891420 Temecula, CA 92591, USA Sales: 951.308.9269 Fax: 310.833.7306 Email: nisupply@gmail.com We prefer Paypal! Pay me securely with any major credit card through PayPal!