Dual Range QAC Test Strip, Low Range: 0, 10, 20, 40, 80, High Range: 0, 100, 200, 400, 800, Applications: Food and Beverage, Laundry and Sanitation, Industrial Water Boiling and Cooling, Water and Wastewater, Chem
Equilateral Prisms 3pc set, 1in, 2in, and 4in lengths, Material: Acrylic, Each prism is individually wrapped to protect it Will create a rainbow with any standard light source (phone will work) -- use a dark piece of paper with a 1-2mm slit, Size: 25mm face size
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