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Water resistance
Electrons inside an object will escape to the surface immediately when light irradiates on it
Long Wave Form Spring
even in wet conditions
sieve tube
1pc Heavy Duty Opthalmic Eye Occluder for Testing Purposes Electricity Essentials Water resistanceIncludes: 1 x Heavy Duty Opthalmic Eye Occluder. Color: Black. 14 Pinholes design can clearly display the target objects, exercise the eye muscles. Premium Quality: Occluder is made of high quality, heavy duty and durable materials. Designed for use in professional fields but is an ideal choice for science classrooms and household use. If you need custom order with different sizes design, please contact us. Safely Packaged to avoid being damaged
US$ 55.00
US$ 203.00
US$ 20.00
