Forensic Presumptive Blood Test Kit, 30 Tests Geology_Geology Specimen Collections Four-diode bridge rectifier rated 5A

Four-diode bridge rectifier rated 5A at 100V with 4mm input connections and the circuit diagram printed on the case

Demonstration spherometer with an oversized 133 mm dial head and baked enamel finish

Heavy-duty powder-coated square dual boss head joins two rods up to 15mm at right angles on retort stand frames

letting students quantify expansion coefficients side by side

Forensic Presumptive Blood Test Kit, 30 Tests Geology_Geology Specimen Collections Four-diode bridge rectifier rated 5AReagent based and classroom safe, this presumptive blood test kit uses phenolphthalein and hydrogen peroxide swabs to reveal blood presence through a rapid color change.