What are the internal and external dimensions of the washers? The package dimensions are useless.

I measured the outer diameter to be =25.0mm (just a hair under 1"), inner diameter = 9.0mm (about 11/32"), thickness = 3.0mm (about 1/4"). Hard to measure more exactly because they are elastic.

How much heat will these withstand?

Depending on the silicon grade, typical range for silicon gasket temperature is approx. -100° F to 500° F for high quality silicon and conservative approximate range of -25° F to 300° F.

How thick are these? From current reviews it's sounding more than 1/8"

Below are measurements (thickness) in three formats using calipers: 1/8 inch .12 inch 3 mm

How malleable are these in terms of stretching?

They do stretch, but thickness and strength will cause the washer to buckle, if you force it over a larger object. I needed the center hole to be larger, so I used a sharp metal tube, curtain rod, to enlarge the hole.

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Litorange Grolsch Gaskets Silicone Seals - For Swing Top Bottles-40 Pack Combo Pack Clear, Made from Soft Silicone (Not Rubber, Better Sealing Than Rubber)

Litorange Grolsch Gaskets Silicone Seals - For Swing Top Bottles-40 Pack Combo Pack Clear, Made from Soft Silicone (Not Rubber, Better Sealing Than Rubber)

Product ID: 142417913

📦40-pack with handy storage box

🔄Fits most swing-top bottles

🛡️Soft silicone for superior sealing

$19.88

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Description

🔒 Seal your brew, secure your vibe!

BULK PACK CONVENIENCE - 40 clear gaskets included with a sleek plastic storage box—always have spares ready for your next batch.
TRUSTED BY ENTHUSIASTS - Top-rated with 4.5 stars from 700+ brewers who demand reliability and quality.
UNIVERSAL COMPATIBILITY - Designed to fit most swing-top and flip-top beverage bottles, making it your go-to gasket solution.
UNMATCHED SEAL INTEGRITY - Soft silicone construction ensures leak-proof, crack-resistant performance—no more spills or wasted brews.
PREMIUM FDA APPROVED MATERIAL - Crafted from high-quality, food-safe silicone for durability and peace of mind.

Litorange Grolsch Gaskets are premium soft silicone seals designed for swing-top and flip-top bottles. This 40-pack combo offers durable, FDA-approved gaskets that resist cracking and leaking, ensuring a reliable airtight seal. Perfect for home brewers and beverage enthusiasts seeking quality and convenience in one package.

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