Lens Set of 6 | Concave Lens | Convex Lens

Lens Set of 6 | Concave Lens | Convex Lens

Marsoni

M251S

$15.65

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

Lens Set of 6 | Concave Lens | Convex LensIncludes: 1 x 50mm Diameter Double Convex lens, 1 x 50mm Diameter Plano Convex lens, 1 x 50mm Diameter Concavo Convex lens, 1 x 50mm Diameter Convexo Concave lens, 1 x 50mm Diameter Plano Concave lens, 1 x 50mm Diameter Double Concave lens. Wooden storage box to protect the kit. Premium Quality: Optically worked, back silvered, with protective coating. Designed for use in professional laboratories but is an ideal choice for science classrooms and

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This is a nifty little product. It heats up pretty quickly and really does keep my beverages warm or hot, perhaps it's because it's an AC plug-in rather than USB. :) The options for length of time & degree of heat are VERY beneficial & it's an easy "touch" control. For someone who forgets to "turn things off", the auto shutoff is ideal! (lol) It's flat, steady & doesn't take up much room. The only drawback for me is that the entire tray gets hot, not just the part that the mug sits on, otherwise I'd have given it not 5 but 10 stars! It will be interesting to see how long it lasts though. :)

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Reviewed in the United States on May 6, 2026

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Books Love Me

Lexington, US

★★★★★ 5

Coffee keep warm plate

Color: Silver, Color: Silver

4 heat settings. Love the hour timer. I can set how many hours I want it to keep my coffee warm. Very value at a great low price.

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Reviewed in the United States on May 12, 2026

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Quin

Phoenix, US

★★★★★ 5

It's hot.

Color: Silver

It's hot. I like it. I make my tea in a 20 oz mug. Invariably it gets cold and I need to reheat it. Someone suggested I order a mug warmer. I chose this one. It has 3 heat settings and a 12 hr timer with auto turn off. What more could I ask for? Except that it has a low profile and easy to read and set settings, it does. Prefect.

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Reviewed in the United States on May 19, 2026

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Barb

Massapequa, US

★★★★★ 5

Effective and easy to use.

Color: Silver

Keeps my coffee and tea hot while I work at my desk. Easy to set temperatures, and to change them for different beverages.

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Reviewed in the United States on May 17, 2026