Atago 3749 Dip Style Urine Specific Gravity Digital Hand-Held Pen Refractometer, 1.0000 to 1.0600 Urine Specific Gravity, ± 0.0010 Urine Specific Gravity Accuracy
</br></br>

</br></br></br></br></br></br></br></br></br></br>

</br></br></br></br></br></br></br></br></br></br>
<img src='http://ecx.images-amazon.com/images/I/315iCErm5OL.jpg'></br>