[A Must Tool for Photography]If you want to take some amazing pictures, or some basic optical research, or as a kids friends lover etc. this high quality K9 optical crystal photography prism set are highly recommend to you. It can manipulate light through light refraction to form a kaleidoscope-like and rainbows pattern. [High Quality K9 Crystal Prism Set]Each of the RGB optical prism Square is a Square made of made of high quality optically , which is not easy to fade and scratch resistant, thus ensuring maximum use in few years. The K9 crystal prism set inspect by each QC team, make sure free of , distortions, color or inclusions. [Muti-Function Use]The set are believed to clear our mind and absorb sunshine and moonlight too. Can add brightness and harmony to your life space or studio, also can use them for decoration or teaching. Like showing the rainbow and science physics teaching photography crystal equilateral fractal spectrum prism. [Gift Box Packaging]This optical set include: 1 x 55mm crystal ball, 1 x 50mm crystal prism, 1 x 50mm crystal cube, 1 x 60mm pyramid with the white gift box and wiper cloth. Really an Perfect spectrum education. If the sun isn't shining, you can use a flashlight. Just position your prism so that the light shines through it, and there should be rainbows dancing on the opposite wall! [Gift Use for Students or Teachers]Can be used as a kids, students, teachers in the opening season, showing as a day, Christmas, New Year, Birthday or some festivals. The exquisite decoration on any surface or table of multi-dimensional cubes can exude a pleasant optical entertainment effect, everyone will enjoy and be fascinated. Material: crystal colour: transparent Package Contents: 4 x Optical Crystal Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.