The turbidimeter comes with low-turbidity calibration vials and an anti-scratch silicone oil cleaning kit. All accessories are precisely configured and organized in a portable case. Whether used for fixed laboratory testing or mobile on-site operations, it is ready to use—saving time and effort. | Vevor | | Turbidity Meter, 0–1000 NTU Measuring Range, EPA 180.1 Compliant, Portable White Light | Blue & Black | Best Buy