TGX Series

Marsoni

M251S

$737.10

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

TGX SeriesAFM grating with undercut edge structures anisotropically etched in silicon The silicon calibration grating from the TGX series is an array of square holes with sharp undercut edges formed by anisotropic etching along the (111) crystallographic planes of silicon. The typical radius of the edges is less than 5nm. SEM image of a TGX grating SEM image of the TGX surface structures Schematic of the TGX grating structures Part number Pitch Accuracy Edge

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We offer a 30-day return/exchange service after receiving.
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This product just feels like it was made on the bottom dollar. It is very cheaply made and the doors to the battery compartment are so fragile it feels like they may snap next time I have to change the batteries. There's absolutely no weather proofing so I wouldn't leave it outside in the rain or heat. That being said, it's fine. It stays put on our umbrella and puts out light, albeit not much light.

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Reviewed in the United States on April 16, 2021

Verified Purchase

Kim C

Boise, US

★★★★★ 5

Functional and easy to install!

Color: Cool White

This umbrella light is super handy! It hinges open to allow installation around the umbrella pole, so you don’t have to remove umbrella from table to add the light. I like that it can be charged with included USB cord or can use regular batteries. The different light settings are also nice depending on how much light you need or want at the time. We’ll be using this quite often when sitting at the table by the pool this summer.

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Reviewed in the United States on July 21, 2025

Verified Purchase

Sarah B.

Carnegie, US

★★★★★ 5

Easy to use

I love these. Not only do they work at reducing any blemish size and inflammation, they are practically invisible like advertised.

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Reviewed in the United States on April 29, 2026

Verified Purchase

Yana Tsikhinskaya

Houston, US

★★★★★ 5

Really help soothe redness and speed up healing

I've been using these patches for a while now and I'm very happy with them - they're virtually invisible on the skin, stay on well and really help soothe redness and speed up healing.

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Reviewed in the United States on April 8, 2026