are these polarized or non-polarized?

All electrolytic capacitors are polarized indicated by a "+" symbol or band. This must be observed when replacing an existing electrolytic. I surmise from your question that you should do some research on line. There are many informative sites. Even Wickipedia.

What do the numbers mean (e.g., 4x7 and 5x11)?

It indicates the physical size of tha capacitor, diameter and height.

Generally speaking, electrolytics of this size are rarely certified as “low ESR. Usually they have higher voltage ratings and higher capacitance values. That said, I would say “no.”

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Swpeet 240Pcs 24 Kinds Different Electrolytic Capacitors Range 0.1uF－1000uF Assortment Kit, 10V/16V/25V/50V Aluminum Radial Electrolytic Capacitors for TV, LCD Monitor, Radio, Stereo, Game

Swpeet 240Pcs 24 Kinds Different Electrolytic Capacitors Range 0.1uF－1000uF Assortment Kit, 10V/16V/25V/50V Aluminum Radial Electrolytic Capacitors for TV, LCD Monitor, Radio, Stereo, Game

Product ID: 100867510

Details

Brand
Swpeet
Capacitance
0.1 microfarad
Material
Aluminum
Maximum Storage Temperature
105 °C
Shape
Cylindrical

📦Organized reusable storage box

🔋240 pcs capacitors kit

🌡️Wide -40℃ to +105℃ range

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Description

⚡ Power Your Projects with Precision & Style!

BUILT TO ENDURE - Operates flawlessly from -40℃ to +105℃ ensuring stability in any environment.
ALL IN ONE POWERHOUSE - 240 precision aluminum electrolytic capacitors spanning 0.1uF to 1000uF for every project need.
EFFORTLESS ORGANIZATION - Clearly labeled, compartmentalized box keeps your components sorted and ready to deploy.
VERSATILE COMPATIBILITY - Perfect for repairing or upgrading TVs, radios, game consoles, and prototyping with ease.
MILLENNIAL MAKERS MUST HAVE - Compact, reliable, and humidity-resistant capacitors designed for the modern DIY innovator.

The Swpeet 240-piece electrolytic capacitor assortment offers 24 different capacitance values from 0.1uF to 1000uF, rated up to 50V, housed in a reusable, clearly labeled box. Engineered with high-quality aluminum, these capacitors deliver stable performance across a wide temperature range (-40℃ to +105℃), making them ideal for electronics repair, prototyping, and hobbyist projects.

Specifications

ASIN	B07KC99W2K
Best Sellers Rank	#77,142 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #557 in Industrial Electrical Capacitors
Brand Name	Swpeet
Capacitance	0.1 microfarad
Capacitance Tolerance	20
Customer Reviews	4.6 4.6 out of 5 stars (1,744)
Item Shape	Cylindrical
Manufacturer	Swpeet
Material Type	Aluminum
Maximum Storage Temperature	105 °C
Maximum Voltage	50 volts
Mounting Type	Through-Hole Mount
Number of Items	240
Operating Voltage	50 volts
Part Number	S309-Capacitor-240
UPC	754914370178
Upper Temperature Rating	105 °C

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HK$187

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