These are quarts pendulums .
these are used to check if egg is fertile or in fertile and also if the fertilised eggs are male or female.
$10 each and plus postage ($2.20)
$12.20 in total
here is a demonstration
https://youtu.be/ODzADBxAiXg
AVOID GETTING SCAMMED!NEVER PAY A SELLER VIA PAYPAL FAMILY & FRIENDS!
Buy & Sell Fertile Poultry Eggs Australia EggSellent.com.au