A handheld spectroscope for visible light shows the absorption lines of the elements involved in producing its color. It helps to separate ruby (chrome) against red or pink sapphire (iron). It can be used to demonstrate the phenomenon of the chromatic dispersion of white light by quantitative analysis.
Hand Stretch Film Dispenser is a hand operated stretch film dispenser designed specifically for those who require economical stretch wrap packaging with a minimum investment. It secures pallets in tough film in minutes. It is used to dispense all hand stretch film. It has ball bearing tension control. It can be used for 12″ up to 18″ rolls of stretch wrap.