If they are 90% chance this is made in china how can we know the plastic is bpa free?

Don't see that it matters. Nothing passes through the device into the carboy and positive to static neutral pressure inside prevents air from entering. Zero contact means no chance of transfer.

Can the airlock be removed from the bung and used with other standard bungs?

Yes, the twin bubble airlock can be removed from the bung.

what is the height of these from top to bottom?

aloha it is 7 inches.Try making "mead" it is amazingly good even with regular yeast! Add raisins

Will this fit my 5 gallon class jug?

Yes. The universal bungs that come with the twin bubble airlocks are designed for 3, 5 & 6 gallon glass carboys.

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(2 Pack) - Twin Bubble Airlock and Carboy Bung (Pack of 2)

(2 Pack) - Twin Bubble Airlock and Carboy Bung (Pack of 2)

Product ID: 732619348

Details

Brand
FastRack
Global Trade Identification Number
Is Customizable
No
Item Weight
30 Grams
UPC
628504292792

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MX$2924

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Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
FastRack
Global Trade Identification Number
Is Customizable
No

Description

desertcart.co.jp: (2 Pack) - Twin Bubble Airlock and Carboy Bung (Pack of 2) : Office Products

Specifications

ASIN	B00A6TRKO4
Brand Name	FastRack
Customer Reviews	4.6 4.6 out of 5 stars (13,440)
Global Trade Identification Number	00825392000052
Is Customizable?	No
Item Weight	30 Grams
Manufacturer Part Number	B00A6TRKO4
Model Number	B00A6TRKO4
UPC	628504292792 825392000052

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