This equipment is used for the study of spectrums. This equipment consists of scale with a diameter of 150mm. and is able to rotate, and comes with a lock/unlock button. At the top there is a collimator 178mm. in length which is attached to a prism. The base is adjustable and comes with a focus lens of 25mm. The slit is movable for the length of 7mm. The telescope is 178mm. in length and is attached to the base which is horizontally adjustable. The focus lens of 25mm. can zoom in 8 times. This equipment includes prism camp, grating holder, step lock, and the packaging.