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$42.99700-1400nm Wavelength Light Display Detection Sensor, Observation Card, Frequency Multiplier Card, Photosensitive Card, Optical Detection, Dimmer Strip (A1-10mm*10mm)Amazon- SAVE $1.00$16.66$17.66Gravity Defying Kinetic Desk Toy, Desktop Suspended Gyroscope,Optical Illusion Desk Toy, Gravity-Defying Metallic Shape, Stainless Steel Sphere, Stress Relief Kinetic Sculpture (Color : A1)Amazon