Has adjustable slit and scale.
Housed in a durable black plastic case.
Has an eyepiece with grating attached at one end and an adjustable slit at the other.
Produces an excellent spectrum even at low light levels.
The adjustable slit allows maximum resolution with sharpest bands at predominant wavelengths.
The spectrum appears on the right side of the slit below a calibrated scale.
Size dimensions: 190 x 100 x 25 mm.
The scale indicates the wavelength of predominant colours seen as bright bands in the spectrum.