KSH 206 KSH 164
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Holographic diffraction grating 36x38mm 600 lines 1mm grates Optical teaching experiment Transmission grating No shell
2in1 40M 5M Laser Tape Measure Digital Distance Meter Handheld Range Finder Tool
Fresnel lens Infrared induction 120 ° induction angle 11M distance PIR lens high sensitivity Infrared sensing of human body
Fresnel lenses 10 pcs Stage lights diy Projector for led Spotlight thickness 0.9mm magnifier 45x45mm F29mm Customizable