Item Description: JBJ C-Scope Salinity Refractometer Product Description Specifically designed for aquarium use for measuring the salinity of salt water; easier to read the scale displayed from 01.020-01.040. Hand held refractometers Easier to calibrate Measuring the salinity of sea water International Shipping: International shipping is via either US Postal's Global Priority (Air) Mail, which is $15.00 ($12.00 to Canada) and takes 3-8 business days. Shipping Insurance is an additional $15.00. Questions? Larger orders? Multiple Orders? Prefer a different shipping method? Please feel free to call, fax or e-mail! Other types of Portable Refractometers are available through our Store! Check out our other items! National Industrial Supply 30777 Rancho California #891420 Temecula, CA 92589, USA Sales: 951.308.9269 Fax: 310.833.7306 We prefer Paypal!