Young’s Slit Apparatus Experiment Kit

Marsoni

M251S

$20.79

Get it in 3 business days with 1 day shipping. Friday, May 29

Young’s Slit Apparatus Experiment KitIncludes: Young's slit with holder and stand included in the set. Premium Quality: Kit is made of high quality, heavy duty and durable materials. A double slit 10 mm long x1 mm separation in 50 x 50 mm frame. Mounted in channel with a hinged joint and micrometer screw to give fine adjustment. Perfect for observation of fringes produced by interference between two beams of light from a common source. Designed for use in professional laboratories but is

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Fantastic products!! Got these for my son’s 10 wk old chocolate lab puppy. He immediately started chewing on one and continued for close to an hour. I wish I had tried these with each of my own labs when they were pups (we’ve had 5 over the past 20 years). Inexpensive and an easy way to keep a determined chewer occupied without food/treats. I highly recommend for a heavy chewing breed like Labradors!!

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Reviewed in the United States on March 29, 2026

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Norma C.

Carnegie, US

★★★★★ 1

Junk

The star didn't last 24 hours with my 5 month old Frenchie. She chewed a piece off the blue rubber star and I think she ingested it bc I can't find it. Hoping and praying she doesn't get sick from ingesting it. I won't be giving her anymore of these.

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Reviewed in the United States on May 8, 2026

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Cindy

Carnegie, US

★★★★★ 4

Nice toy for puppy to chew

Nice puppy toy to teeth on but I would have given it 5 star if only it had some crinkle or squeak to it!

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Reviewed in the United States on December 9, 2025

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Monica Rennick

Los Angeles, US

★★★★★ 3

Short term fun ending in stuffing everywhere

My dog loved the toys, from the start he grabbed them and ran off to play. However the quality just doesn't hold up to a 7 month old 42 pound mixed doggie. The star toy broke immediately and I had to throw bits of the plastic away. He did enjoy ripping the other toys and pulling out all the stuffing. I did not enjoy picking it all up on the yard. For the price it was OK, but didn't last long and needs supervision for the inevitable destruction. At least he enjoyed them while they lasted, which is why they got 3 stars instead of 2.

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Reviewed in the United States on September 4, 2025