This Auction Is for a 3 inch X 3 inch (Roughly 7.5cm x 7.5cm) Square Of Our Amazing Diffraction Grating Film Encapsulated In Its Own Laser Cut Acrylic Display Case. Turn Sunlight Into A Rainbow!  Or Split Laser Light Into Multiple Dots!! Q: How Does It Work? A: As Sunlight Hits The Film It Is Split Using Over 13,500 Microscopic Lines Per Inch Which Then Pass Through  Projecting A Full Rainbow Of Colours Onto Walls And Surfaces. Alternatively Use A Laser Pen To Split One Dot Into Multiple!!  Q: What Sizes Do You Have? A: We Sell These in 6 Inch And 3 Inch Squares, Complete With Their Own Cases Q: What Can It Be Used For?  A: It Can Be Used As A Sun Catcher, Laser Pen Light Splitter Or Even An Interesting Effect For Photography!  There Are Many Other Scientific Experiments That It Can Be Used For Also Q: Can I Remove The Sheet From The Case? A: If You Like! However Please Use Gloves As Oil From Bare Skin Will Leave Fingerprints PLEASE CHECK OUT OUR OTHER LIGHT PRODUCING PRODUCTS! Postage Is 2nd Class To Any UK Address, International Postage Available Too, Multiple Buys Will Be Sent Tracked And Recorded. Please Note That Due To A Level Of High Static Electricity When Making These Items, Dust And Other Small Particles May Be Present. Any Questions Please Ask Any Time!