EISCO Labs Economy Spectroscope Tube, Pack of 6 update_march2023 and the size is :

and the size is : 30*25

anti-oxidation and fadeless

Excellent Material The hose flow meter made of high quality acrylic

BPA free food-safe grade and dishwasher

EISCO Labs Economy Spectroscope Tube, Pack of 6 update_march2023 and the size is :EISCO Labs Economy Spectroscope Tube, Pack of 6 This spectroscope has been designed to let the user look through a slit spectrum of light decomposed by an optical system. The resulting spectra as viewed through the grating introduces students to many properties of visible light and optics. Allows students to quickly identify constituent wavelengths of visible light in many sources. An adjustable thin slit cap rotates to produce diffraction patterns in