Mudwatt Classic Kit, Right or Left Handed: Fits Either Hand, track the growth of your electric bacteria colony with the blinker circuit and MudWatt Explorer App
Rectangular Refraction Cell, Material: acrylic rectangular, Color: clear, excellent for showing refraction and internal reflection in water, and to measure its refractive index, has uniform wall thickness to eliminate distortions, Dimension: 6X3X6.2 CM
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