It's a new product from BESTO, very easy to use and simple, most suitable for undergraduate course. The kit briefly covers the fundamentals of Light principle like diffraction, refraction, interference etc.The kit is very handy to use, one can demonstrate all experiments in a Class room. Consist of Laser diode along other Optical Components, performed so many experiments. l Optical Rail One-Meter-Long Cat No. 1240-b l 2nos Standard Triangular Mount Carriers Model MC-S l One no.