PH meter 1,Range:6.8-8.2 2,Box size:10.3*8.2*3.6cm 3,color:red and yellow 4,material: ... CE,ISO and ROHS certification.1,Range:6.8-8.22,Box size:10.3*8.2*3.6cm3,color:red and yellow4,material ... , for example ,1 pc in a small box, 100 small boxes in a big box and so on.But if you have ...