Experiment Box Set Optical Bench And Attachment Set Physics Teaching Profession Optical Equipment Parallel Light SourceFeatures:Three Way Linear Light Source can be adjusted by using a screwdriver to adjust the direction of light.Optical Experiments: Refraction of light, convex lens refraction, lens refraction, refraction, Lens good safe and to use, and a practical teaching tool kits.Package Including: Biconvex Lens; Single Concave Lens; Glass Tile; Double Concave Lens; Triangular Prism...The Physics Optical Experiment set will give your child a understanding of physical optics and make learning easier!Specifications:Color As The Picture ShowsPackage Weight: approx.800gSize: approx.24x14cm/9.44x5.51inPackage Includes:1 x Physical Optics SetNote:Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks! The Physics Optical Experiment set will give your child a understanding of physical optics and make learning easier! Lens good safe and to use, and a practical teaching tool kits. Optical Experiments: Refraction of light, convex lens refraction, lens refraction, refraction, Package Including: Biconvex Lens; Single Concave Lens; Glass Tile; Double Concave Lens; Triangular Prism... Three Way Linear Light Source can be adjusted by using a screwdriver to adjust the direction of light. ASIN B0DDXB3YSH Brand Name Meiliyizu Unit Count 1 Count Manufacturer Meiliyizu Item Dimensions 2 x 2 x 2 inches Manufacturer Part Number Meiliyizu