Item Type: Refractometer <br>Material: Plastic, Aluminum <br>Color: As Pictures Shown <br>Weight: Approx. 253g / 8.9oz <br>Salinity: 0-28% <br>Product Size: Approx. 17.2x4x4cm / 6.8x1.6x1.6in<br>1、Product Structure Analysis: Fast measurement, accurate data, convenient use, wide application and complete equipment. <br>2、Adjustable Eyepiece: When salinity refractometer scale is not clear, you can gently rotate the eyepiece for adjustment. <br>3、Clear Reading: 0?28% salinity refractometer has fast detection, accurate measurement, clear display and convenient use. <br>4、Cover Plate Function: The use of cover plate is to protect the prism and make the measurement more stable. <br>5、Calibration Screw: Drop distilled water on the prism and turn the zero adjustment screw to adjust the dividing line to 0% of the scale.<p>1 x Refractometer&nbsp;</p><p>1 x Straw</p><p>1 x Lens Cloth&nbsp;</p><p>1 x Screwdriver&nbsp;</p><p>1 x Manual</p><p>1 x Plastic Box&nbsp;</p>