Do the mantles still contain Thorium Dioxide? Does it say anything about heavy metals/radioactivity on the packaging?

Thorium Nitrate is what most mantles are dipped in newer ones use yttrium or cerium. When burned the first time the thorium is changed to thorium oxide, and this is what you see when you use your light. It has basically been converted from nylon webbing to ceramic. An inch away from a thorium mantle and you’re at background radiation so the radioactivity at the actual mantle is near negligible (still there but not harmful).

I have an old model 231 dual mantel colman lantern. On the lantern it recommend to use 21A mantels. Would these fit?

Yes, the #21 Sock style filament would be the replacement part needed for the Coleman Sock Tie-Style Mantle you mentioned.

How long does it burn?

The cloth of the mantle burns away very quickly leaving the ash which is what makes the light. The ash will last as long as it isn't disturbed, so with a little care it can provide light for many hours.

If I want the dark green color carrying case, is it available and can it be assured?

This is the wrong listing, but if you are referring to the green "lantern case," the color in the listing is generally random. If you are referring to the coleman fuel carrying case, it is only available from Japan Amazon and is green.

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Coleman String Tie Lantern Mantles, 4-Pack of Coleman Lantern Mantles for Fueled Lanterns

Product ID: 90299879

Details

Brand
Coleman
Colour
Material
Aluminium
Number of Packs
4
Product dimensions
18.3L x 11.9W

🔥Ultra-bright aluminium mantle

🧵Optimized string tie design

🛠️4-pack for extended use

S/.149

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Description

🔥 Light up your nights, don’t get left in the dark!

PACK MORE POWER - Four mantles per pack mean you’re always ready for your next outdoor escape without running out.
EFFORTLESS SETUP - Optimized string tie design ensures quick and secure installation—get your lantern glowing in seconds.
TRUSTED DURABILITY - Crafted by Coleman, a leader in outdoor gear, these mantles deliver consistent performance trip after trip.
JOIN THE CAMPING ELITE - With over 10,000 glowing reviews, these mantles are the must-have upgrade for serious adventurers.
ILLUMINATE EVERY ADVENTURE - Experience superior brightness with Coleman’s aluminium mantles that light up your campsite like never before.

Coleman String Tie Lantern Mantles come in a convenient 4-pack featuring an optimized string tie design for easy installation. Made from durable aluminium, these mantles provide bright, reliable light for fueled lanterns, making them an essential accessory for camping and outdoor enthusiasts.

Specifications

ASIN	B000J084KY
Best Sellers Rank	73,492 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 60 in Camping & Hiking Lantern Accessories
Brand Name	Coleman
Colour	Multi-coloured
Customer Reviews	4.7 4.7 out of 5 stars (10,927)
Global Trade Identification Number	00076501204629
Included Components	MANTLE SOCK TIE 4PK C050
Item Dimensions L x W x H	18.3L x 11.9W x 0.1H centimetres
Item Type Name	MANTLE SOCK TIE 4PK C050
Manufacturer	Coleman
Manufacturer Part Number	3000004344
Manufacturer Warranty Description	Manufacturer warranty.
Material	Aluminium
Model Number	3000004344
Number of Items	1
Number of Packs	4
UPC	076501249392 076501204629
Unit Count	4.0 count

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S/.149

Duties & taxes included

In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Peru.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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