What does a plain "K" on a product mean?

What does a plain "K" on a product mean? Stump the Rabbi - Rabbi Yoni Rappaport To ask a question and for more answers visit: http://stumptherabbi.org/ This project was made possible by The Chanin Fund Reliable Fast Cash, LLC http://reliablefastcash.com 668 Follow Stump The Rabbi: YouTube: https://www.youtube.com/c/StumpTheRabbi Facebook: https://www.facebook.com/Stumptherabbi Instagram: https://www.instagram.com/stumptherabbi/ Twitter: https://twitter.com/Stump_The_Rabbi